ClassID:

198039

G11B7/083 - CPC Classification

Classification description:

Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation , reproducing using an optical beam at lower power ; Record carriers therefor; Disposition or mounting of heads or light sources relatively to record carriers relative to record carriers storing information in the form of optical interference patterns, e.g. holograms

Recent Application in this class:
#1
20240257834
2024-08-01

Holographic storage

#2
20230120717
2023-04-20

Holographic storage

#3
20230047873
2023-02-16

OPTICAL SYSTEM FOR HOLOGRAPHIC STORAGE AND DESIGN METHOD FOR FRESNEL LENS AND META LENS THEREOF

#4
20210233568
2021-07-29

High-speed parallel reproducing holographic disk reading method and device

#5
20210225401
2021-07-22

Reflective holographic optical storage method and device

#6
20210225399
2021-07-22

Holographic storage device and method for simultaneously recording and reading on two sides

#7
20210201950
2021-07-01

Holographic multiplexed recording method for increasing storage capacity

#8
20210201949
2021-07-01

Multiplexing method for increasing storage capacity in disc-type holographic storage medium

#9
20210201948
2021-07-01

Holographic data storage device with single-arm structure

#10
20200363240
2020-11-19

Optical encoder system and method

#11
20200354497
2020-11-12

Photopolymer composition

#12
20190195662
2019-06-27

Optical encoder system and method

#13
20170236543
2017-08-17

OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE AND HOLOGRAPHIC RECORDING/REPRODUCING METHOD

#14
20170200463
2017-07-13

Optical information recording device and optical information recording method

#15
20160336034
2016-11-17

OPTICAL INFORMATION REPRODUCING DEVICE AND REFERENCE BEAM ADJUSTING METHOD

#16
20160232933
2016-08-11

Hologram reproducing apparatus and hologram reproducing method

#17
20160217811
2016-07-28

BIO-DISC DETECTION DEVICE

#18
20160118076
2016-04-28

Optical information recording/reproducing apparatus

#19
20160111125
2016-04-21

Reception terminal and a method for compensating inter-symbol interference and computer readable recording medium for performing the same

#20
20160042757
2016-02-11

Hologram recording and playback device and hologram playback method

#21
20150340055
2015-11-26

Optical information recording and reproducing apparatus and optical information recording and reproducing method

#22
20150318012
2015-11-05

Optical information reproduction apparatus and optical information reproduction method

#23
20150318011
2015-11-05

Recording/reproducing apparatus and recording medium

#24
20150206551
2015-07-23

Information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method

#25
20140118508
2014-05-01

Digital hologram display device

#26
20140071799
2014-03-13

Optical information recording device and method

#27
20130128327
2013-05-23

Optical information recording/reproducing apparatus, optical information recording/reproducing method, and optical information recording medium

#28
20130028066
2013-01-31

Method of reading optical information and method of recording optical information

#29
20120294130
2012-11-22

DATA STORAGE DEVICE

#30
20120188618
2012-07-26

OPTICAL INFORMATION REPRODUCING METHOD AND OPTICAL INFORMATION REPRODUCING APPARATUS

#31
20120170438
2012-07-05

Servo structure in single-bit holographic volume recording and readout

#32
20120163140
2012-06-28

Multi-stage focus actuator and optical head

#33
20120147725
2012-06-14

REPRODUCING APPARATUS AND REPRODUCING METHOD

#34
20120140606
2012-06-07

Information storage device, information recording medium, and information storage method

#35
20120134251
2012-05-31

System and method for precise servoing

#36
20120092980
2012-04-19

Replication and formatting method and system for bit-wise holographic storage

#37
20120051201
2012-03-01

Data reproducing apparatus

#38
20120050831
2012-03-01

Reproduction apparatus and reproduction method

#39
20120026856
2012-02-02

Optical information record/reproduction apparatus and reproduction apparatus

#40
20120008476
2012-01-12

INFORMATION REPRODUCTION APPARATUS AND METHOD FOR CONTROLLING SAME

#41
20120002519
2012-01-05

Disk-shaped recording medium, optical spot position control device, and optical spot position control method

#42
20110317537
2011-12-29

Multilayer coaxial holographic storage system

#43
20110255391
2011-10-20

Hologram recording and reproducing device and method for recording hologram

#44
20110242958
2011-10-06

System and method for transfer of data stored in holographic storage medium

#45
20110228663
2011-09-22

HOLOGRAPHIC RECORDING METHOD

#46
20110222380
2011-09-15

OPTICAL DISC APPARATUS, OPTICAL DISC, RECORDING METHOD, AND REPRODUCTION METHOD

#47
20110216382
2011-09-08

Hologram recording medium, hologram recording apparatus and method, and computer program

#48
20110170395
2011-07-14

Optical information recording apparatus

#49
20110170391
2011-07-14

System and method for controlling tracking in an optical drive

#50
20110141867
2011-06-16

Optical information recording/reproducing apparatus and optical information reproducing apparatus

#51
20110075539
2011-03-31

Method and apparatus for recording/reproducing on/from a recording medium

#52
20110044151
2011-02-24

ELECTRONIC DEVICE

#53
20100309768
2010-12-09

Hologram disc reading and writing apparatus and hologram disc reading apparatus

#54
20100296381
2010-11-25

Apparatus and method to store information in a holographic data storage medium

#55
20100265808
2010-10-21

Hologram device, tilt detection method, and tilt correction method

#56
20100260022
2010-10-14

Light spot position control apparatus and light spot position control method

#57
20100246371
2010-09-30

OPTICAL INFORMATION RECORDING APPARATUS AND METHOD OF OPTICALLY RECORDING INFORMATION

#58
20100246367
2010-09-30

OPTICAL INFORMATION RECORDING METHOD AND APPARATUS USING THE SAME

#59
20100246348
2010-09-30

OPTICAL INFORMATION REPRODUCING METHOD, OPTICAL INFORMATION REPRODUCING APPARATUS, AND OPTICAL INFORMATION RECORDING MEDIUM

#60
20100245955
2010-09-30

Light irradiation device for recording information in a hologram recording medium

#61
20100225985
2010-09-09

REPRODUCING DEVICE AND REPRODUCING METHOD

#62
20100221646
2010-09-02

HOLOGRAPHIC RECORDING MEDIUM

#63
20100220570
2010-09-02

Signal quality evaluating apparatus and method, and information recording medium

#64
20100208562
2010-08-19

Optical information recording device and method

#65
20100202270
2010-08-12

Optical information recording method and apparatus

#66
20100182664
2010-07-22

Hologram recorder

#67
20100182663
2010-07-22

LIGHT ILLUMINATING APPARATUS AND LIGHT ILLUMINATING METHOD

#68
20100182662
2010-07-22

RECORDING/REPRODUCTION METHOD AND HOLOGRAM RECORDING MEDIUM

#69
20100172003
2010-07-08

HOLOGRAM APPARATUS AND RECORDING AND REPRODUCING METHOD OF THE SAME

#70
20100165825
2010-07-01

OPTICAL RECORDING/REPRODUCING DEVICE

#71
20100165818
2010-07-01

System and method for dual-beam recording and readout of multilayered optical data storage media

#72
20100165816
2010-07-01

System and method for tracking in single-bit holographic data storage

#73
20100165427
2010-07-01

HOLOGRAM RECORDING/REPRODUCING APPARATUS AND METHOD

#74
20100157776
2010-06-24

VERTICALLY TRACKED DATA STORAGE DEVICE AND METHOD

#75
20100157775
2010-06-24

Holographic storage devices with complementary data layer and use thereof

#76
20100157774
2010-06-24

DATA STORAGE SYSTEMS AND METHODS

#77
20100157401
2010-06-24

Apparatus and method for reading and apparatus for reading and writing holograms

#78
20100149957
2010-06-17

Method and system for detection enhancement for optical data storage

#79
20100149946
2010-06-17

Method for reproducing hologram

#80
20100149945
2010-06-17

Record medium, optical disk unit using it, and recording method

#81
20100142352
2010-06-10

Method of recording holographic information and apparatus for recording/reproducing holographic information

#82
20100123944
2010-05-20

REPRODUCTION APPARATUS AND REPRODUCTION METHOD

#83
20100118682
2010-05-13

Apparatus and method for recording data on holographic storage medium

#84
20100110865
2010-05-06

Optical information recording and reproducing apparatus, and cartridge

#85
20100103487
2010-04-29

Holographic storage system for reading a hologram stored on a holographic storage medium and a method carried out therewith

#86
20100080104
2010-04-01

Information recording/reproducing apparatus, apparatus for manufacturing optical information recording medium, and optical information recording medium

#87
20100074074
2010-03-25

METHOD AND APPARATUS FOR RECORDING OPTICAL INFORMATION, AND METHOD AND APPARATUS FOR REPRODUCING OPTICAL INFORMATION

#88
20100073747
2010-03-25

Wavelength-multiplex and space-multiplex holographic storage device

#89
20100061215
2010-03-11

Optical information recording and reproducing apparatus and optical information recording apparatus

#90
20100061210
2010-03-11

OPTICAL DISC AND RECORDING/REPRODUCING METHOD AND APPARATUS FOR THE OPTICAL DISC

#91
20100061203
2010-03-11

METHOD AND APPARATUS FOR RECORDING AND/OR REPRODUCING DATA INTO AND/OR FROM OPTICAL DISK

#92
20100060961
2010-03-11

Recording/playback apparatus, recording apparatus, playback apparatus, recording/playback method, recording method, and playback method

#93
20100054107
2010-03-04

Recording and reproducing apparatus

#94
20100054104
2010-03-04

Hologram recording and reproducing device and method for recording hologram

#95
20100053710
2010-03-04

Apparatus for recording/reproducing holographic data and method of adjusting position of recording layer

#96
20100046338
2010-02-25

Optical disc apparatus, focus position control method and recording medium

#97
20100039918
2010-02-18

Hologram recording/reproducing device, method thereof, and holographic recording medium

#98
20100027403
2010-02-04

Optical disc apparatus and signal generation method

#99
20100021007
2010-01-28

RECONSTRUCTION OF DATA PAGE FROM IMAGED DATA

#100
20100020375
2010-01-28

Method of recording holographic information using hologram mark and homogeneous mark

#101
20100014137
2010-01-21

Holographic multiplex recording method, holographic recording apparatus and holographic recording medium employing the method using interference fringes

#102
20100008206
2010-01-14

Method and apparatus for recording/reproducing holographic information

#103
20100008204
2010-01-14

MULTI-WAVELENGTH MICRO HOLOGRAPHIC DATA RECORDING/REPRODUCING APPARATUS

#104
20090323500
2009-12-31

OPTICAL HOLOGRAPHIC DEVICE AND METHOD WITH ALINGNMENT MEANS

#105
20090323481
2009-12-31

DRIVE APPARATUS AND TRACK JUMP METHOD

#106
20090297955
2009-12-03

OPTICAL RECORDING COMPOSITION, HOLOGRAPHIC RECORDING MEDIUM, AND METHOD OF RECORDING AND REPRODUCING INFORMATION

#107
20090296542
2009-12-03

Optical disc apparatus and correction servo control signal generation method

#108
20090279152
2009-11-12

HOLOGRAM RECORDER

#109
20090268582
2009-10-29

OPTICAL INFORMATION REPRODUCING APPARATUS AND METHOD THEREOF

#110
20090268568
2009-10-29

Portable data storage assembly having a holographic data storage layer and an optical tracking layer

#111
20090262408
2009-10-22

OPTICAL PICKUP APPARATUS AND HOLOGRAM RECORDING AND REPRODUCING SYSTEM

#112
20090262406
2009-10-22

Recording device, recording/reproducing method, and reproducing method

#113
20090245052
2009-10-01

OPTICAL RECORDING METHOD, OPTICAL RECORDING APPARATUS, OPTICAL RECORDING MEDIUM, AND OPTICAL RECORDING AND REPRODUCING METHOD

#114
20090245037
2009-10-01

Focus Servo Method, Optical Reproducing Method, and Optical Reproducing Apparatus

#115
20090214885
2009-08-27

Light-induced directed self-assembly of periodic sub-wavelength nanostructures

#116
20090207710
2009-08-20

Use of feedback error and/or feed-forward signals to adjust control axes to optimal recovery position of hologram in holographic data storage system or device

#117
20090197185
2009-08-06

DOCUMENT RECORDING METHOD AND APPARATUS

#118
20090175149
2009-07-09

HOLOGRAPHIC INFORMATION RECORDING AND/OR REPRODUCING APPARATUS

#119
20090174920
2009-07-09

Apparatus for recording/reproducing holographic data

#120
20090170008
2009-07-02

HOLOGRAPHIC RECORDING COMPOSITION AND HOLOGRAPHIC RECORDING MEDIUM

#121
20090168627
2009-07-02

Method of reading optical information and method of recording optical information

#122
20090168130
2009-07-02

HOLOGRAM RECORDING METHOD AND HOLOGRAM RECORDING DEVICE

#123
20090168129
2009-07-02

Replication of data to holographic medium using holographic master media

#124
20090153929
2009-06-18

APPARATUS FOR RECORDING/REPRODUCING HOLOGRAPHIC INFORMATION

#125
20090153927
2009-06-18

Holographic data storage medium and apparatus and method for recording/reproducing holographic data to/from the same

#126
20090147653
2009-06-11

Holographic content search engine for rapid information retrieval

#127
20090141325
2009-06-04

Hologram Device and Recording Method

#128
20090141323
2009-06-04

Hologram recording medium, hologram recording apparatus and method, and computer program

#129
20090135459
2009-05-28

Hologram recording apparatus and hologram recording/reproducing method

#130
20090116088
2009-05-07

Optical unit, method for controlling drive, and holographic apparatus

#131
20090103415
2009-04-23

Optical recording method, optical recording apparatus, optical recording medium, and optical recording and reproducing method by use of holography

#132
20090103154
2009-04-23

Recording apparatus and information processing apparatus equipped with the same

#133
20090103153
2009-04-23

HOLOGRAPHIC RECORDING AND READING METHOD AND HOLOGRAPHIC RECORDING AND READING APPARATUS

#134
20090103152
2009-04-23

Common aperture holographic storage system with reduced noise

#135
20090097086
2009-04-16

Lens system for common aperture holographic storage system

#136
20090086595
2009-04-02

OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS, OPTICAL INFORMATION REPRODUCING APPARATUS, AND OPTICAL INFORMATION RECORDING/REPRODUCING METHOD

#137
20090080315
2009-03-26

OPTICAL INFORMATION RECORDING AND REPRODUCING APPARATUS AND METHOD OF OPTICALLY RECORDING AND REPRODUCING INFORMATION

#138
20090079275
2009-03-26

Actuator

#139
20090059330
2009-03-05

Optical apparatus

#140
20090059329
2009-03-05

Hologram reading apparatus, hologram reading method, hologram recording apparatus and hologram recording method

#141
20090059328
2009-03-05

Hologram reading apparatus, hologram reading method, hologram recording apparatus and hologram recording method

#142
20090052300
2009-02-26

Hologram information recording medium and hologram information recording/reproducing device

#143
20090040885
2009-02-12

Search method

#144
20090040581
2009-02-12

Recording apparatus and recording method

#145
20090021811
2009-01-22

OPTICAL INFORMATION RECORDING APPARATUS

#146
20090016189
2009-01-15

Recording/reproducing apparatus, method of reproducing data, and servo controlling method

#147
20090010133
2009-01-08

Recording medium using reference pattern, recording/reproducing method of the same and apparatus thereof

#148
20090003155
2009-01-01

OPTICAL INFORMATION RECORDING DEVICE, OPTICAL PICKUP, OPTICAL INFORMATION RECORDING METHOD AND OPTICAL INFORMATION RECORDING MEDIUM

#149
20080316902
2008-12-25

Optical disc device and converging position correction method

#150
20080316894
2008-12-25

Holographic recording/reproducing apparatus having aperture of variable size

#151
20080304392
2008-12-11

Hologram Storage System

#152
20080304122
2008-12-11

Hologram recorder

#153
20080252953
2008-10-16

Holographic storage and regeneration system having servo mechanism

#154
20080247010
2008-10-09

Hologram Recording and Reproducing Apparatus and Hologram Recording Method

#155
20080239905
2008-10-02

FOCUSING-ERROR DETECTING DEVICE AND HOLOGRAPHIC DATA-RECORDING/REPRODUCING APPARATUS HAVING THE DEVICE

#156
20080239427
2008-10-02

Multiplexing hologram recording and reconstructing apparatus and method therefor

#157
20080231927
2008-09-25

Apparatus and method to store information in a holographic data storage medium

#158
20080218818
2008-09-11

Apparatus and method to store information in a holographic data storage medium

#159
20080205239
2008-08-28

APPARATUS AND METHOD FOR RECORDING/REPRODUCING DATA ON/FROM HOLOGRAPHIC STORAGE MEDIUM

#160
20080204835
2008-08-28

Apparatus for reading from and/or writing to holographic storage media

#161
20080198724
2008-08-21

Method For Recording Data In Holographic Data Storage Systems

#162
20080198429
2008-08-21

Hologram recording device

#163
20080197263
2008-08-21

Miniature single actuator scanner for angle multiplexing with circularizing and pitch correction capability

#164
20080192608
2008-08-14

Velocity Control of Holographic Media

#165
20080192590
2008-08-14

Information recording apparatus and information reproduction apparatus utilizing light

#166
20080192589
2008-08-14

Holographic recording and reproduction system having servo optical path

#167
20080192318
2008-08-14

Miniature single actuator scanner for angle multiplexing with circularizing and pitch correction capability

#168
20080192317
2008-08-14

MINIATURE SINGLE ACTUATOR SCANNER FOR ANGLE MULTIPLEXING WITH CIRCULARIZING AND PITCH CORRECTION CAPABILITY

#169
20080174841
2008-07-24

Hologram recording apparatus

#170
20080170486
2008-07-17

Optical Pickup Device

#171
20080144147
2008-06-19

Reproducing apparatus and reproducing method

#172
20080137512
2008-06-12

Holographic information recording/reproducing apparatus and method for seeking books in the same

#173
20080137162
2008-06-12

Hologram information reproducing device

#174
20080130463
2008-06-05

Information recording apparatus and information reproducing apparatus

#175
20080123506
2008-05-29

Optical information recording/reproducing apparatus

#176
20080112302
2008-05-15

Beam shifting element for an optical storage system

#177
20080112293
2008-05-15

Optical information recording/reproducing apparatus and optical information recording medium

#178
20080106996
2008-05-08

Optical information processing method and optical information reproducing method using multiplexing schemes capable of improving a density of recorded optical information

#179
20080101196
2008-05-01

APPARATUS AND METHOD FOR RECORD AND/OR REPRODUCE HOLOGRAPHIC INFORMATION

#180
20080094998
2008-04-24

SYSTEM FOR GENERATING REFERENCE BEAM ANGLE CONTROL SIGNAL AND HOLOGRAPHIC INFORMATION RECORDING AND/OR REPRODUCING APPARATUS EMPLOYING THE SYSTEM

#181
20080089209
2008-04-17

Optical disc apparatus, focus position control method and optical disc

#182
20080088897
2008-04-17

Hologram reconstructing apparatus and hologram reconstructing method

#183
20080084593
2008-04-10

Holographic information recording-reproducing process and apparatus therefor

#184
20080055605
2008-03-06

Holographic storage system using destructive interference for pixel detection

#185
20080049283
2008-02-28

Shift tolerant lens optimized for phase conjugating holographic systems

#186
20080030826
2008-02-07

Miniature single actuator scanner for angle multiplexing with circularizing and pitch correction capability

#187
20080019253
2008-01-24

Information recording/reproducing device and information reproducing method

#188
20080019252
2008-01-24

Optical recording method, optical recording apparatus, optical recording medium, optical reproducing method, and optical reproducing apparatus

#189
20080008058
2008-01-10

OPTICAL INFORMATION PROCESSING APPARATUS AND METHOD

#190
20080007808
2008-01-10

Hologram Recording and Reproducing Method, Device and System

#191
20080002897
2008-01-03

METHOD AND SYSTEM FOR PARALLEL OPTICAL DECODING OF DIGITAL PHASE IMAGE TO INTENSITY IMAGE

#192
20080002553
2008-01-03

Holographic recording/reproducing apparatus having relative speed controller and method

#193
20070291617
2007-12-20

Optical information reproducing apparatus and optical information recording apparatus using holography

#194
20070291342
2007-12-20

Hologram recording method and hologram recording device

#195
20070268810
2007-11-22

Optical recording medium and data storage method thereof

#196
20070268539
2007-11-22

APPARATUS AND METHOD FOR HOLOGRAPHIC RECORDING AND REPRODUCING

#197
20070247683
2007-10-25

Optical information processing apparatus, optical information recording method, optical information reproducing method and optical information servo controlling method

#198
20070243472
2007-10-18

Holographic recording medium, recording method thereof, reading method thereof, recording apparatus and reading apparatus for holograohic recording medium

#199
20070242589
2007-10-18

Stabilizing holographic disk medium against vibrations and/or controlling deflection of disk medium

#200
20070237055
2007-10-11

Optical information recording and reproducing apparatus, and optical information recording and reproducing method

#201
20070237042
2007-10-11

Apparatus and method for providing a tracking servo control when reproducing optical information

#202
20070236765
2007-10-11

Optical information reproducing apparatus and optical information reproducing method using the same

#203
20070230292
2007-10-04

Medium, apparatus, and method of recording optical-information

#204
20070223326
2007-09-27

Medium, apparatus, and method of recording optical-information

#205
20070223072
2007-09-27

Hologram reproducing apparatus

#206
20070211321
2007-09-13

Method for determining media orientation and required temperature compensation in page-based holographic data storage systems using data page Bragg detuning measurements

#207
20070206252
2007-09-06

Miniature flexure based scanners for angle multiplexing

#208
20070201339
2007-08-30

OPTICAL DISC RECORDING APPARATUS, CONTROLLING METHOD OF THE SAME, AND OPTICAL DISC

#209
20070201338
2007-08-30

OPTICAL DISC RECORDING APPARATUS, CONTROLLING METHOD OF THE SAME, AND OPTICAL DISC

#210
20070195390
2007-08-23

Holographic Recording Method And Holographic Recording Apparatus

#211
20070183009
2007-08-09

Holographic multiplex recording method, and holographic recording apparatus and holographic recording medium employing the method

#212
20070147215
2007-06-28

Optical information recording and reproducing apparatus and optical information recording apparatus

#213
20070147200
2007-06-28

Servo controlling method of optical information processing apparatus and optical information recording and reproducing apparatus

#214
20070146844
2007-06-28

Holographic recording medium, holographic recording apparatus, holographic recording medium, and holographic memory reproducing method and apparatus

#215
20070140091
2007-06-21

Holographic storage and reproduction system and method with servo

#216
20070121468
2007-05-31

Optical information recording and reproducing apparatus

#217
20070121437
2007-05-31

Optical information recording-reproduction apparatus

#218
20070115523
2007-05-24

Holographic memory device

#219
20070115519
2007-05-24

Holographic device with magnification correction

#220
20070109943
2007-05-17

Holographic memory reproduction method and apparatus

#221
20070091399
2007-04-26

Method and system for increasing holographic data storage capacity using irradiance-tailoring element

#222
20070053029
2007-03-08

Replication of data to holographic medium using holographic master media

#223
20070047419
2007-03-01

Optical recording method, optical recording apparatus, optical recording medium, and optical reproducing method

#224
20070041303
2007-02-22

Information storage medium and apparatus for reproducing the same

#225
20070041066
2007-02-22

Hologram recording method and device

#226
20060238841
2006-10-26

Polytopic multiplex holography

#227
20060215529
2006-09-28

Hologram recording and reproducing apparatus

#228
20060181999
2006-08-17

Holographic disk medium with servo marks

#229
20060077856
2006-04-13

Optical information recording apparatus and optical information reproducing apparatus

#230
20060077853
2006-04-13

Apparatus and method for recording and reproducing hologram, and spatial light modulator therefor

#231
20060039051
2006-02-23

Hologram apparatus, positioning method for spatial light modulator and image pickup device, and hologram recording material

#232
20050286388
2005-12-29

Processing data pixels in a holographic data storage system

#233
20050247864
2005-11-10

Mirror angle measurement and servo control apparatus for holographic digital data storage system

#234
20050237896
2005-10-27

Hologram recording/reproducing device and hologram recording medium

#235
20050221198
2005-10-06

Hologram recording material, hologram recording method and optical recording medium

#236
20050179967
2005-08-18

Hologram recording medium, recording/reproducing method and recording/reproducing apparatus

#237
20050174917
2005-08-11

Hologram type optical recording medium, manufacturing method and reproducing apparatus therefor

#238
20050170260
2005-08-04

Double faced double storage capacity medium

#239
20050041270
2005-02-24

Hologram retention method

#240
14673500
2016-04-12

Read channel optimization using multi-dimensional smoothing