Tokyo
Japan
140
2010-09-09
138
2012-01-03
These are the the leading inventors for applications assigned to HITACHI COMMUNICATION TECHNOLOGIES, LTD.:
HITACHI COMMUNICATION TECHNOLOGIES, LTD. based in Tokyo, JP has been assigned the rights to these inventions. The list includes both Pending Applications and Patent Grants:
Multicast path management and protection
#2 | 2010-06-01 ✅ Patent 7,729,699 granted on 2010-06-01Switching center for mobile handover
#3 | 2010-05-06 ✅ Patent 8,190,178 granted on 2012-05-29Cellular phone and mobile switching controller
#4 | 2010-04-08 ✅ Patent 8,374,504 granted on 2013-02-12Optical communication system
#5 | 2010-03-18 ✅ Patent 7,962,037 granted on 2011-06-14PON system and optical network unit
#6 | 2010-03-11 ✅ Patent 8,116,782 granted on 2012-02-14Communication quality control system
#7 | 2010-03-11 ✅ Patent 8,446,816 granted on 2013-05-21Control method for access gateway and communication system
#8 | 2010-03-04 ✅ Patent 8,280,371 granted on 2012-10-02Base station and receiver failure diagnosing method
#9 | 2010-02-18 ✅ Patent 8,175,023 granted on 2012-05-08Radiocommunication system and multicast data distribution method in the radiocommunication system
#10 | 2010-02-11 ✅ Patent 8,340,104 granted on 2012-12-25Communication network system, path calculation device, and communication path establishment control method
#11 | 2010-01-28 ✅ Patent 8,098,678 granted on 2012-01-17PON system
#12 | 2009-12-31 ✅ Patent 7,978,390 granted on 2011-07-12Optical modulator
#13 | 2009-12-24OPTICAL TRANSMISSION DEVICE AND OPTICAL TRANSMISSION METHOD
#14 | 2009-12-10 ✅ Patent 8,320,238 granted on 2012-11-27Communication device with a path protection function, and network system using the communication device
#15 | 2009-12-03 ✅ Patent 8,291,275 granted on 2012-10-16Transmission apparatus, access point and symbol transmission method
#16 | 2009-10-29 ✅ Patent 8,254,955 granted on 2012-08-28Wireless communication system and base station accommodation server
#17 | 2009-10-15 ✅ Patent 8,078,067 granted on 2011-12-13Optical receiving apparatus
#18 | 2009-10-08 ✅ Patent 8,315,668 granted on 2012-11-20Mobile communication system and access gateway having plural user plane AGWS
#19 | 2009-10-01 ✅ Patent 7,916,699 granted on 2011-03-29CDMA communication system and method
#20 | 2009-08-27 ✅ Patent 7,936,992 granted on 2011-05-03Apparatus of adjusting optical signal transmission timing
#21 | 2009-08-20 ✅ Patent 8,873,968 granted on 2014-10-28Optical field receiver, optical multilevel signal receiver, and optical transmission system
#22 | 2009-07-30 ✅ Patent 8,175,606 granted on 2012-05-08Wireless communication system and soft handoff control method in wireless communication system
#23 | 2009-07-16 ✅ Patent 8,036,607 granted on 2011-10-11Wireless terminal and wireless base station
#24 | 2009-06-09 ✅ Patent 7,545,777 granted on 2009-06-09CDMA communication system and method
#25 | 2009-05-21 ✅ Patent 7,996,004 granted on 2011-08-09Wireless communication system and test method thereof, and access terminal for testing wireless communication system
#26 | 2009-05-14 ✅ Patent 8,204,168 granted on 2012-06-19Bit synchronization circuit with phase tracking function
#27 | 2009-04-30 ✅ Patent 7,725,030 granted on 2010-05-25WDM type passive optical network
#28 | 2009-04-02 ✅ Patent 7,809,263 granted on 2010-10-05Optical transmission apparatus and control method therefor
#29 | 2009-03-26 ✅ Patent 7,738,790 granted on 2010-06-15WDM type passive optical network
#30 | 2009-02-26 ✅ Patent 7,711,268 granted on 2010-05-04Passive optical network system and ranging system thereof
#31 | 2009-02-26 ✅ Patent 7,725,031 granted on 2010-05-25Passive optical network system and ranging system thereof
#32 | 2009-02-19 ✅ Patent 7,664,398 granted on 2010-02-16ONU management method and optical line termination
#33 | 2009-02-12 ✅ Patent 7,606,491 granted on 2009-10-20ONU management method and optical line termination
#34 | 2009-02-10 ✅ Patent 7,489,677 granted on 2009-02-10Exchange equipment
#35 | 2009-02-10 ✅ Patent 7,489,700 granted on 2009-02-10Virtual access router
#36 | 2009-01-22 ✅ Patent 8,073,381 granted on 2011-12-06Radio communication system and base station
#37 | 2009-01-22 ✅ Patent 7,756,045 granted on 2010-07-13Optical cross connect apparatus and network
#38 | 2008-12-25 ✅ Patent 7,512,341 granted on 2009-03-31Passive optical network system and ranging system thereof
#39 | 2008-12-11 ✅ Patent 7,676,127 granted on 2010-03-09Optical communication system using WDMA and CDMA
#40 | 2008-11-18 ✅ Patent 7,453,854 granted on 2008-11-18Radio signal communication method, base station and terminal station
#41 | 2008-11-04 ✅ Patent 7,447,497 granted on 2008-11-04Wireless communication apparatus, wireless communication network and software upgrading method
#42 | 2008-08-07 ✅ Patent 7,680,414 granted on 2010-03-16Passive optical network system and operating method thereof
#43 | 2008-07-31 ✅ Patent 7,996,033 granted on 2011-08-09Radio communication system and base station
#44 | 2008-06-26 ✅ Patent 7,457,494 granted on 2008-11-25Dispersion compensator, optical transmission system and optical transmission method
#45 | 2008-06-19 ✅ Patent 7,830,924 granted on 2010-11-09Stuffing and destuffing operations when mapping low-order client signals into high-order transmission frames
#46 | 2008-05-15 ✅ Patent 7,756,057 granted on 2010-07-13Method and apparatus for determining transmission rate based on number of unused slots
#47 | 2008-04-17 ✅ Patent 7,489,869 granted on 2009-02-10Passive optical network system and ranging system thereof
#48 | 2008-04-17 ✅ Patent 7,548,694 granted on 2009-06-16Apparatus of adjusting optical signal transmission timing
#49 | 2008-03-13 ✅ Patent 7,640,013 granted on 2009-12-29Wireless communication apparatus, wireless communication network and software upgrading method
#50 | 2007-11-29 ✅ Patent 8,107,461 granted on 2012-01-31SIP exchange system
#51 | 2007-11-15 ✅ Patent 7,630,637 granted on 2009-12-08PON system and optical network unit
#52 | 2007-10-18 ✅ Patent 7,627,298 granted on 2009-12-01Wireless communication method with data rate selected based on interference
#53 | 2007-10-11 ✅ Patent 7,602,800 granted on 2009-10-13PON system
#54 | 2007-10-04 ✅ Patent 7,551,436 granted on 2009-06-23Electronic apparatus
#55 | 2007-09-27 ✅ Patent 7,415,177 granted on 2008-08-19Dispersion compensation device and dispersion compensation method
#56 | 2007-09-20 ✅ Patent 7,647,039 granted on 2010-01-12Wireless communication apparatus, wireless communication network and software upgrading method
#57 | 2007-08-23 ✅ Patent 7,746,852 granted on 2010-06-29Packet data serving node and communication method using the same
#58 | 2007-08-16 ✅ Patent 7,447,398 granted on 2008-11-04Optical crossconnect apparatus
#59 | 2007-08-07 ✅ Patent 7,254,160 granted on 2007-08-07Radio receiver
#60 | 2007-08-02 ✅ Patent 7,653,310 granted on 2010-01-26Wavelength division multiplex (WDM) transmission system
#61 | 2007-07-31 ✅ Patent 7,251,230 granted on 2007-07-31CDMA mobile communication system and communication method
#62 | 2007-07-26 ✅ Patent 7,577,141 granted on 2009-08-18Communication system
#63 | 2007-07-26 ✅ Patent 7,616,645 granted on 2009-11-10Frame forwarding apparatus for converting VLAN identifiers
#64 | 2007-07-19 ✅ Patent 7,532,624 granted on 2009-05-12Multicast packet control apparatus
#65 | 2007-07-03 ✅ Patent 7,239,813 granted on 2007-07-03Bit synchronization circuit and central terminal for PON systems
#66 | 2007-06-28 ✅ Patent 7,450,288 granted on 2008-11-11Optical modulation device, optical transmitter, and optical transmission equipment
#67 | 2007-06-14 ✅ Patent 7,286,539 granted on 2007-10-23Packet forwarding apparatus with function of limiting the number of user terminals to be connected to ISP
#68 | 2007-05-31 ✅ Patent 7,796,741 granted on 2010-09-14Call connection control unit and call connection control method
#69 | 2007-05-31 ✅ Patent 7,352,316 granted on 2008-04-01Time-interleaved AD converter
#70 | 2007-05-24 ✅ Patent 7,620,002 granted on 2009-11-17Apparatus and method for controlling multiplex number in spatial domain
#71 | 2007-05-17 ✅ Patent 7,493,043 granted on 2009-02-17ONU management method and optical line termination
#72 | 2007-04-26 ✅ Patent 7,502,563 granted on 2009-03-10WDM type passive optical network
#73 | 2007-04-19 ✅ Patent 7,620,074 granted on 2009-11-17Communication system, master communication device, and slave communication device
#74 | 2007-04-19 ✅ Patent 7,634,278 granted on 2009-12-15Wireless communication system and base station
#75 | 2007-03-22 ✅ Patent 7,620,325 granted on 2009-11-17Transmission apparatus with function of multi-step bandwidth assignment to other communication apparatuses
#76 | 2007-03-08 ✅ Patent 7,616,615 granted on 2009-11-10Packet forwarding apparatus for connecting mobile terminal to ISP network
#77 | 2007-03-01 ✅ Patent 7,616,318 granted on 2009-11-10Apparatus for measuring waveform of optical electric field, optical transmission apparatus connected thereto and a method for producing the optical transmission apparatus
#78 | 2007-02-22 ✅ Patent 7,554,717 granted on 2009-06-30Optical transmission device equipped with pluggable variable optical attenuator
#79 | 2007-02-08 ✅ Patent 7,421,283 granted on 2008-09-02Transmission power control method and apparatus for mobile communication system
#80 | 2007-02-08 ✅ Patent 7,483,506 granted on 2009-01-27Bit synchronization circuit with phase tracking function
#81 | 2007-02-01 ✅ Patent 7,369,768 granted on 2008-05-06Optical access system
#82 | 2007-01-25 ✅ Patent 7,406,310 granted on 2008-07-29Network management apparatus and method of selecting base station for software update
#83 | 2006-12-14 ✅ Patent 7,457,542 granted on 2008-11-25Optical access network system
#84 | 2006-11-30 ✅ Patent 7,542,719 granted on 2009-06-02Wireless communication system, wireless relay unit and wireless terminal constituting the wireless communication system, and wireless communication method
#85 | 2006-11-30 ✅ Patent 7,515,832 granted on 2009-04-07Optical transmission equipment and integrated circuit
#86 | 2006-10-19 ✅ Patent 7,580,636 granted on 2009-08-25Optical switch and method for controlling optical path thereof
#87 | 2006-10-05 ✅ Patent 7,599,682 granted on 2009-10-06Method of implementing multi-party conference service by using broadcast/multicast service of a wireless communications system
#88 | 2006-09-28 ✅ Patent 7,577,135 granted on 2009-08-18IP telephone system
#89 | 2006-09-28 ✅ Patent 7,639,984 granted on 2009-12-29Wireless communication system
#90 | 2006-09-28 ✅ Patent 7,353,020 granted on 2008-04-01Radio access point testing apparatus and method of testing radio access point
#91 | 2006-09-21 ✅ Patent 7,643,421 granted on 2010-01-05Packet forwarding apparatus
#92 | 2006-08-24 ✅ Patent 7,599,660 granted on 2009-10-06Base station apparatus and control method for controlling channel density
#93 | 2006-08-24 ✅ Patent 7,496,383 granted on 2009-02-24Mobile communication system and base station control apparatus
#94 | 2006-08-24 ✅ Patent 7,649,890 granted on 2010-01-19Packet forwarding apparatus and communication bandwidth control method
#95 | 2006-08-03 ✅ Patent 7,650,075 granted on 2010-01-19Optical add-drop multiplexer, and optical network equipment using the same
#96 | 2006-07-27 ✅ Patent 7,555,269 granted on 2009-06-30Adaptive modulation scheme and coding rate control method
#97 | 2006-07-20 ✅ Patent 7,636,879 granted on 2009-12-22Error correction decoder
#98 | 2006-07-06 ✅ Patent 7,626,934 granted on 2009-12-01Packet transfer apparatus
#99 | 2006-06-22 ✅ Patent 7,218,818 granted on 2007-05-15Dispersion compensation device and dispersion compensation method
#100 | 2006-06-22 ✅ Patent 7,435,013 granted on 2008-10-14Variable dispersion compensation equipment, optical transmission system using it and method of setting dispersion compensation quantity
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