ClassID:

49162

B29C44/60 - CPC Classification

Classification description:

Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles; Auxiliary operations Measuring, controlling or regulating

Sub-classes:
Recent Application in this class:
#1
20260115980
2026-04-30

DEVICE FOR PREPARATION OF EXPANDED MICROSPHERES

#2
20260021612
2026-01-22

METHOD FOR ESTIMATING GAS CONCENTRATION IN MOLTEN RESIN IN INJECTION DEVICE FOR FOAM MOLDING

#3
20260021611
2026-01-22

VARIABLE PRESSURE CONTROLLED INJECTION METHOD, SEMI-FINISHED INJECTION PRODUCT, AND CO-INJECTION PRODUCT MANUFACTURING METHOD

#4
20250360662
2025-11-27

ELECTROMAGNETIC FOAMING

#5
20250205942
2025-06-26

MOULD FOR PARTICLE FOAM MOULDING

#6
20250170763
2025-05-29

AIR SUPPLY OF APPLICATION DEVICE FOR PRODUCING MULTIPLE COMPONENT MIXTURE

#7
20250162213
2025-05-22

INJECTION DEVICE FOR FOAM MOLDING, INJECTION MOLDING MACHINE, AND MATERIAL SUPPLYING METHOD

#8
20250162212
2025-05-22

METHOD FOR PRODUCING MOLDED ARTICLE OF THERMOPLASTIC RESIN EXPANDED BEADS

#9
20250121546
2025-04-17

INJECTION DEVICE FOR FOAM MOLDING, INJECTION MOLDING MACHINE, AND FOAM MOLDING METHOD

#10
20250114986
2025-04-10

CURABLE COMPOSITION FOR MECHANICAL FOAMING AND METHOD FOR MANUFACTURING FOAM OF THE SAME

#11
20250108542
2025-04-03

System and method for automatically setting parameters for foam production

#12
20250065545
2025-02-27

MOLDING DEVICE AND MOLDING METHOD

#13
20250050554
2025-02-13

SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR INTRODUCING FOAM INTO A CONFINED SPACE

#14
20250033254
2025-01-30

METHOD AND DEVICE FOR PRODUCING A PARTICLE FOAM PART AND A METHOD FOR CALIBRATING THE PRODUCTION PROCESS

#15
20250010526
2025-01-09

RECORDING APPARATUS AND RECORDING METHOD

#16
20240391144
2024-11-28

Supercritical In-mold Foam Forming Device with Pretreatment Function and Foaming Method Thereof

#17
20240335985
2024-10-10

MOLDING DEVICE AND MOLDING METHOD

#18
20240335984
2024-10-10

Method for Metering a Foamed or Foamable Plastic in a Preferably Discontinuous Manner with a Direct Gas Loading Process

#19
20240294720
2024-09-05

FOAM ARTICLE WITH ENHANCED PROPERTIES

#20
20240198563
2024-06-20

METHOD AND DEVICE FOR PROCESSING PARTICLE FOAM MATERIAL TO PRODUCE A MOLDED PARTICLE FOAM PART

#21
20240181687
2024-06-06

METHOD FOR FILLING A MOLDING TOOL CAVITY OF A MOLDING TOOL FOR PRODUCING A MOLDED PARTICLE FOAM PART WITH PARTICLE FOAM MATERIAL

#22
20240169117
2024-05-23

FOAM IN PLACE SIMULATION METHOD

#23
20240165860
2024-05-23

FOAM MOLDING METHOD, CONTROL METHOD FOR INJECTION MOLDING MACHINE FOR FOAM MOLDING, AND INJECTION MOLDING MACHINE FOR FOAM MOLDING

#24
20240117135
2024-04-11

FOOTWEAR COMPONENT MANUFACTURING SYSTEM

#25
20240084088
2024-03-14

FOOTWEAR MOLD SYSTEM FOR INJECTION-MOLDING

#26
20240084087
2024-03-14

FOOTWEAR MOLD ASSEMBLY FOR INJECTION-MOLDING

#27
20240051208
2024-02-15

INJECTION MOLDING MACHINE FOR PERFORMING FOAM MOLDING AND METHOD FOR CONTROLLING INJECTION MOLDING MACHINE

#28
20240051197
2024-02-15

DEVICE AND METHOD FOR MANUFACTURING BOARD-LIKE INSULATING ELEMENTS

#29
20240051196
2024-02-15

Polymer foam system and method

#30
20240032942
2024-02-01

METHOD AND DEVICE FOR GENERATING INJECTABLE FOAM

#31
20240025094
2024-01-25

METHODS, SYSTEMS AND COMPUTER PROGRAM PRODUCTS FOR PRODUCING POLYURETHANE FOAM PRODUCTS USING OPTICAL AND INFRARED IMAGING

#32
20240025092
2024-01-25

SYSTEM FOR PRODUCING AT LEAST ONE PARTICLE FOAM MOULDING

#33
20240017452
2024-01-18

GAS SUPPLY DEVICE, INJECTION MOLDING MACHINE, AND FOAM MOLDING METHOD

#34
20230407033
2023-12-21

Foam article with enhanced properties

#35
20230382025
2023-11-30

DEVICE FOR PROCESSING A PARTICLE FOAM MATERIAL TO PRODUCE A PARTICLE FOAM MOULDED PART

#36
20230311378
2023-10-05

INJECTION MOLDING SYSTEM AND INJECTION MOLDING METHOD

#37
20230303796
2023-09-28

Footwear component manufacturing methods

#38
20230302693
2023-09-28

METHOD FOR CONTROLLING THE OPERATION OF A DEVICE FOR PRODUCING A PARTICLE FOAM COMPONENT

#39
20230278305
2023-09-07

SYSTEM AND METHODS FOR FORMING A SOLE STRUCTURE

#40
20230271358
2023-08-31

PROCESS FOR MAKING PRODUCTS OF MULTI-GRADIENT FOAMED POLYMERIC MATERIAL

#41
20230264394
2023-08-24

SYSTEM FOR THE PRODUCTION OF AT LEAST ONE PARTICLE FOAM MOLDING

#42
20230202082
2023-06-29

METHOD FOR PRODUCING A MOULDED PART BY STRUCTURAL FOAM MOULDING, MOULDED PART OF AN EXPANDED THERMOPLASTIC MATERIAL AND USES THEREFOR

#43
20230166432
2023-06-01

Method of filling simulated muscles for limb of crash test dummy for automobile

#44
20230158721
2023-05-25

System for controlling the sizing of a rising foam emulsion web travelling on a conveyor

#45
20230158720
2023-05-25

Foam molding method and injection molding machine

#46
20230158719
2023-05-25

Method and Mold for Producing a Sandwich Component

#47
20230023694
2023-01-26

Method for fusing particle foams by means of porous sleeves

#48
20220410447
2022-12-29

SYSTEM FOR TREATMENT OF A MULTI-LAYERED CUSHIONING PRODUCT AND OPERATING METHOD FOR A SYSTEM FOR EXPANDING A MULTI-LAYERED CUSHIONING PRODUCT

#49
20220371236
2022-11-24

DEVICE FOR PROCESSING A PARTICLE FOAM MATERIAL TO PRODUCE A PARTICLE FOAM MOULDING

#50
20220355517
2022-11-10

CURABLE COMPOSITION FOR MECHANICAL FOAMING AND METHOD FOR MANUFACTURING FOAM OF THE SAME

#51
20220324142
2022-10-13

METHODS, SYSTEMS AND COMPUTER PROGRAM PRODUCTS FOR PRODUCING RIGID FOAM BOARDS USING OPTICAL AND INFRARED IMAGING

#52
20220227153
2022-07-21

Production method of a modeled object

#53
20220161468
2022-05-26

VISUAL METAL PANEL QUALITY DETECTION BASED ON CUTTING EDGE

#54
20220143879
2022-05-12

DUAL EXPANDING FOAM FOR CLOSED MOLD COMPOSITE MANUFACTURING

#55
20220105481
2022-04-07

HOT MELT ADHESIVE FOAM DISPENSING SYSTEM

#56
20220105480
2022-04-07

Hot melt adhesive foam dispensing system

#57
20220097266
2022-03-31

Molding method

#58
20220089918
2022-03-24

RADIOPAQUE FOAM

#59
20220009137
2022-01-13

Extruding system and method of extruding a mixture of a polymeric material and a blowing agent

#60
20210402656
2021-12-30

Polymer foam system and method

#61
20210354349
2021-11-18

Footwear component manufacturing system

#62
20210354345
2021-11-18

Footwear component manufacturing methods

#63
20210339445
2021-11-04

Method and system for improving the production of a cased device

#64
20210339440
2021-11-04

Foaming method by effusing SCF through plastic granules

#65
20210332210
2021-10-28

Method for preparing polymer mould-free stereostructure foamed product from supercritical fluid

#66
20210278202
2021-09-09

Hardness and flatness tester

#67
20210277199
2021-09-09

Foam article with enhanced properties

#68
20210276294
2021-09-09

Footwear mold system for injection-molding

#69
20210276293
2021-09-09

Footwear mold assembly for injection-molding

#70
20210189055
2021-06-24

COMPOSITE STRUCTURE

#71
20210170655
2021-06-10

INJECTION MOLDING OF CROSSLINKING POLYMERS

#72
20210138701
2021-05-13

Moulding tool for foam overmolding a glass pane and at least one insert part

#73
20210072218
2021-03-11

Expansion ratio detection system

#74
20210069949
2021-03-11

MOLDING DEVICE AND MOLDING METHOD

#75
20210023748
2021-01-28

METHOD FOR PRODUCING A MOULDED PART BY STRUCTURAL FOAM MOULDING, MOULDED PART OF AN EXPANDED THERMOPLASTIC MATERIAL AND USES THEREFOR

#76
20210008767
2021-01-14

Injection molding system and injection molding method

#77
20210001522
2021-01-07

Foam molding method and injection molding machine

#78
20200346378
2020-11-05

VARIABLE DEVICE AND METHOD FOR APPLYING A FOAMABLE REACTION MIXTURE TO A MOVING COVER LAYER

#79
20200346377
2020-11-05

Expandable foaming molds and applications thereof

#80
20200338794
2020-10-29

Intra-mode moulding foam molding device of thermoplastic polymer particle and molding method for same

#81
20200325299
2020-10-15

Reduced density thermoplastics

#82
20200324446
2020-10-15

INJECTION CONTROLLER WITH INSULATION COMPONENT MONITORING AND VERBAL ANNOUNCEMENT OF DISPENSE-RELATED INFORMATION

#83
20200307042
2020-10-01

INJECTION MOLDING APPARATUS AND INJECTION MOLDING METHOD

#84
20200223122
2020-07-16

Process and device for producing molded foam

#85
20200217652
2020-07-09

Hardness and flatness tester

#86
20200207137
2020-07-02

Setting apparatus, shaping system, setting method, and computer-readable recording medium

#87
20200140040
2020-05-07

Boat With An Enhanced Buoyant Body And Foam Filling Method For The Buoyant Body

#88
20200129286
2020-04-30

Controlling bubble formation in silicone foam filler of breast implants

#89
20200108756
2020-04-09

METHOD FOR MANUFACTURING A VEHICLE SEATING SYSTEM

#90
20200094450
2020-03-26

Methods for forming rotor blades having foam cores

#91
20200087944
2020-03-19

Support Poles

#92
20190367698
2019-12-05

Method for preparing foamed thermoplastic polyurethane elastomer product

#93
20190329463
2019-10-31

Mixing device for producing a plastic melt loaded with a propellant

#94
20190322012
2019-10-24

MANUFACTURE OF STRUCTURAL PANELS

#95
20190291314
2019-09-26

POLYMER FOAM PROCESSING INCLUDING DIFFERENT TYPES OF BLOWING AGENT

#96
20190283287
2019-09-19

METHOD FOR MANUFACTURING THERMOPLASTIC ELASTOMER FOAMING PARTICLE MOLDED BODY

#97
20190263034
2019-08-29

SYSTEM AND METHOD FOR PRODUCING A FOAMED POLYMER

#98
20190168428
2019-06-06

Filling injector and method for operating a filling injector

#99
20190159786
2019-05-30

Method and device for generating injectable foam

#100
20190136565
2019-05-09

Support Poles

#101
20190118433
2019-04-25

METHOD FOR PRODUCING A MOULDED PART BY STRUCTURAL FOAM MOULDING, MOULDED PART OF AN EXPANDED THERMOPLASTIC MATERIAL AND USES THEREFOR

#102
20190118432
2019-04-25

BLOWING AGENT INTRODUCTION IN POLYMER FOAM PROCESSING

#103
20190099963
2019-04-04

Multi-layered composite structures and methods for the preparation thereof

#104
20190048111
2019-02-14

Process for the production of high internal phase emulsion foams

#105
20190030769
2019-01-31

METHOD FOR PRODUCING A CLIMATE CONTROL BOX

#106
20190030767
2019-01-31

Expanding foam presence sensor and related methods

#107
20190022907
2019-01-24

Process for producing longer fibers in injection molded solid parts by dissolving of gas during plasticizing

#108
20190001538
2019-01-03

Filling apparatus for foamable material and filling method therefor

#109
20180370092
2018-12-27

Thermally expandable sheet, production method for thermally expandable sheet, and 2.5D image forming method

#110
20180361643
2018-12-20

Injection molding of crosslinking polymers

#111
20180361635
2018-12-20

Injection molding of crosslinking polymers

#112
20180361634
2018-12-20

Expansion device, three-dimensional image forming system, expansion method of thermally-expandable sheet, and recording medium

#113
20180339439
2018-11-29

Method and apparatus for manufacturing foam molded body

#114
20180290351
2018-10-11

DEVICE AND PROCESS FOR PRODUCING MOLDINGS COMPOSED OF A PARTICLE FOAM

#115
20180272777
2018-09-27

Expansion device, three-dimensional image forming system, method of expanding thermally expandable sheet, and computer readable storage medium

#116
20180272578
2018-09-27

Expansion device and molding system

#117
20180264865
2018-09-20

IMAGE FORMATION SYSTEM, THREE-DIMENSIONAL IMAGE FORMATION SYSTEM, THREE-DIMENSIONAL IMAGE FORMATION METHOD, AND COMPUTER-READABLE STORAGE MEDIUM

#118
20180264692
2018-09-20

Method and apparatus for forming three-dimensional image

#119
20180257273
2018-09-13

Three-dimensional image data generation system, three-dimensional image data generation method, and computer-readable recording medium

#120
20180194055
2018-07-12

Method and device for determining a layer property of a layer in an extrusion process

#121
20180194045
2018-07-12

METHOD OF MOLDING A VULCANIZED FOAM RUBBER SOLE FOR FOOTWEAR AND RELATED SOLE OF VULCANIZED FOAM RUBBER FOR FOOTWEAR

#122
20180174289
2018-06-21

Display device, three-dimensional image data creation device, and computer-readable storage medium

#123
20180147755
2018-05-31

Three-dimensional image forming system and three-dimensional structure

#124
20180117823
2018-05-03

Process and device for producing molded foam

#125
20180079118
2018-03-22

Display device, three-dimensional image forming system, and computer-readable storage medium

#126
20180043588
2018-02-15

Auto catch apparatus and method of use in making chemical mechanical polishing pads

#127
20170312953
2017-11-02

Method for controlling a step of a process automatically carried out using a machine and a method for producing a particle foam part

#128
20170157815
2017-06-08

METHOD AND APPARATUS FOR CONTINUOUS FOAMING OF A PANEL

#129
20170144339
2017-05-25

Method and apparatus for forming three-dimensional image

#130
20170120485
2017-05-04

Device for delivering an insulation enhancing polyurethane foam within profiles used in doors, windows and related applications

#131
20170095952
2017-04-06

Method, device and a computer program for manufacturing a pre-insulated skeleton framing segment

#132
20170087749
2017-03-30

METHOD FOR PRODUCING A CLIMATE CONTROL BOX

#133
20160375701
2016-12-29

Product molding system and method of labeling molded products

#134
20160361848
2016-12-15

MOLDED FOAM SUBSTRATE BACKING, TOOL, AND PROCESS

#135
20160354956
2016-12-08

Apparatus and method for manufacturing interior part of vehicle

#136
20160311134
2016-10-27

Apparatus and method for the production of a particle foam part

#137
20160303818
2016-10-20

Foam stiffened structure and method of making the same

#138
20160229096
2016-08-11

Bulk-density measuring device for pre-expanded particles and method for manufacturing pre-expanded particles

#139
20160221232
2016-08-04

Apparatus and system for expanding expandable polymeric microspheres

#140
20160101546
2016-04-14

Method for producing a foamed body by extrusion and extrusion device for producing a foamed body

#141
20160031133
2016-02-04

FOAM MOLDING SYSTEM AND METHOD OF OPERATION

#142
20160017086
2016-01-21

FLEXIBLE, OPEN-CELL THERMOSET FOAMS AND BLOWING AGENTS AND METHODS FOR MAKING SAME

#143
20150375434
2015-12-31

Method, device and a computer program for manufacturing a pre-insulated skeleton framing segment

#144
20150336307
2015-11-26

Method for producing foamed molded product

#145
20150273741
2015-10-01

Pad formation method, assembly and pad produced thereby

#146
20150246987
2015-09-03

Process for the production of high internal phase emulsion foams

#147
20150197611
2015-07-16

Vacuum-supported method for the production of polyurethane foam

#148
20150133573
2015-05-14

Method for producing foamed molded bodies

#149
20150130102
2015-05-14

INSULATOR WITH EMBEDDED MASSES

#150
20140377530
2014-12-25

Reduced density thermoplastics

#151
20140377523
2014-12-25

METHODS FOR MAKING MULTI-LAYERED PLASTIC END PRODUCTS

#152
20140327167
2014-11-06

Systems for forming aggregate materials from heat fusable powered materials

#153
20130288038
2013-10-31

Phenol resin foamed plate

#154
20130216638
2013-08-22

Molding apparatus and method

#155
20130047551
2013-02-28

Foam-in-bag device with bag-status indicator

#156
20130037984
2013-02-14

Method, device and a computer program for manufacturing a pre-insulated skeleton framing segment

#157
20120326352
2012-12-27

METHOD FOR THE INJECTION MOULDING OF PLASTIC PARTS FROM THERMOPLASTIC MATERIAL

#158
20120270007
2012-10-25

METHOD AND DEVICE FOR THE PRODUCTION OF BACK-FOAMED AIR-PERMEABLE TEXTILE PRODUCTS

#159
20120251647
2012-10-04

Systems for forming aggregate materials from heat fusable powdered materials

#160
20120217382
2012-08-30

Apparatus and method for producing a component and aircraft structure component

#161
20120181718
2012-07-19

Method for making foam-in-place cushions with selective distribution of foam

#162
20120153523
2012-06-21

PROCESS FOR PRODUCING LOW-DENSITY POLYURETHANE MOLDINGS

#163
20120114897
2012-05-10

Foam Stiffened Structure and Method of Making the Same

#164
20120088073
2012-04-12

Method For The Production Of A Sound Insulation Molding With Mass And Spring

#165
20110293915
2011-12-01

High-pressure device

#166
20110221085
2011-09-15

Method and apparatus for feeding a polyurethane mixture into hollow bodies

#167
20110160689
2011-06-30

HIGH INTERNAL PHASE EMULSION COMPRISING PHOTOINITIATOR

#168
20110160326
2011-06-30

HIGH INTERNAL PHASE EMULSION FOAM HAVING LOW LEVELS OF UNPOLYMERIZED MONOMERS

#169
20110160321
2011-06-30

REDUCTION OF UNPOLYMERIZED MONOMERS IN HIGH INTERNAL PHASE EMULSION FOAM

#170
20110160320
2011-06-30

Method for the production of high internal phase emulsion foams using ultraviolet light

#171
20110159206
2011-06-30

Process for the production of high internal phase emulsion foams

#172
20110159194
2011-06-30

Method of using a carrier sheet in a continuous high internal phase emulsion foam forming process

#173
20110159135
2011-06-30

System for producing high internal phase emulsion foam

#174
20110147975
2011-06-23

Apparatus for producing hard polyurethane foam by froth process

#175
20110115112
2011-05-19

Methods of dispensing and making porous material with growth enhancing element

#176
20100237525
2010-09-23

Injection foam molding machine and method of injection foam molding

#177
20100215934
2010-08-26

COMPOSITION, PROCESS AND INSTALLATION FOR THE CONTINUOUS PRODUCTION OF A FOAMED POLYMERIC SHEET AND SHEET THUS PRODUCED

#178
20100193385
2010-08-05

Process for manufacturing kitting foam inserts

#179
20100189972
2010-07-29

Foamed molding and its manufacturing method

#180
20100187710
2010-07-29

FOAM MOLDING METHOD AND APPARATUS

#181
20100181692
2010-07-22

Method and apparatus for molding resin foam product

#182
20100069517
2010-03-18

Method of forming a polyurethane foam

#183
20100044907
2010-02-25

Pad formation method, assembly and pad produced thereby

#184
20100038008
2010-02-18

Method and combined set comprising a device and a film material for manufacturing foam cushions

#185
20090243135
2009-10-01

Method and apparatus for making foam-in-place cushions with selective distribution of foam

#186
20090110902
2009-04-30

Method for the production of a sound insulation molding with mass and spring

#187
20090056286
2009-03-05

Dispensing system with material spill prevention system

#188
20090048361
2009-02-19

Method for producing and monitoring the compressive strength of foam insulation board

#189
20090044632
2009-02-19

Method and apparatus to monitor the compressive strength of insulation boards

#190
20090008058
2009-01-08

Casting materials

#191
20080272510
2008-11-06

Method and Apparatus for Directly Injecting Steam in an Expanded Plastic Material Mold

#192
20080258324
2008-10-23

Foam molding method and apparatus

#193
20080110926
2008-05-15

Dispensing system and chemical flow heating means for use therein

#194
20080044641
2008-02-21

Method and device for the production of back-foamed air-permeable textile products

#195
20080012166
2008-01-17

Molding method and apparatus for producing molded foamed resin product

#196
20070270991
2007-11-22

System and method for monitoring consumable usage in packaging machines

#197
20070252298
2007-11-01

Method and apparatus for making foam-in-place cushions with selective distribution of foam

#198
20070182045
2007-08-09

Method for foaming of refrigerator cabinet with uniform density by feedback control and foaming system used thereof

#199
20070176313
2007-08-02

Molding method and apparatus of fiber filler reinforced resin molded article

#200
20070114692
2007-05-24

Air flow nozzle for air flow meter

#201
20070114691
2007-05-24

Adjustable flow nozzle for air flow meter

#202
20070023969
2007-02-01

Online control of blowing agent content of polymer beads for making lost foam patterns

#203
20070003651
2007-01-04

Mold for pressurizing foamable material

#204
20060267232
2006-11-30

Process control system and a mold assembly for expandable plastic containers

#205
20060211780
2006-09-21

Method and apparatus for the continuous manufacture of expandable plastic granulate

#206
20060202371
2006-09-14

Method and plant for the continuous production of sheets of foamed material

#207
20060167121
2006-07-27

Process and apparatus for the optimized production of foam in a continuous block slabstock process

#208
20060148909
2006-07-06

One-pack hardening paste material for use in foaming machine

#209
20060128820
2006-06-15

Process and installation for the production of foam in a continuous foaming process

#210
20060103042
2006-05-18

Method and apparatus for foam molding

#211
20060101559
2006-05-18

Custom-fitted helmet and method of making the same

#212
20060093538
2006-05-04

Method and apparatus for controlling nucleation in a dispensing system

#213
20060004481
2006-01-05

Three-dimensional foam analysis method, product design aiding method using the analysis method, and recording medium recording these methods

#214
20050242200
2005-11-03

Method and device for thermostatically regulating a fluid along a conveyance tube

#215
20050230861
2005-10-20

Method for expansion injection molding

#216
20050218543
2005-10-06

Method of controlling pore characteristics of porous structure

#217
20050175726
2005-08-11

Forming apparatus for forming a foamed body from a foamable plastic material under pressure control

#218
20050133944
2005-06-23

Horizontal vacuum chamber seal control device

#219
20050089674
2005-04-28

Molded foam vehicle energy absorbing device and method of manufacture

#220
20050087997
2005-04-28

Molded foam vehicle energy absorbing device and method of manufacture

#221
20050055975
2005-03-17

Method and apparatus to monitor the compressive strength of insulation boards

#222
20050055973
2005-03-17

Insulated stud panel and method of making such

#223
20050044820
2005-03-03

Dispensing system with means for easy access of dispenser components and method of using same

#224
20050029304
2005-02-10

Method and apparatus for mixing a high-viscosity material into a gas

#225
20050029132
2005-02-10

Bag forming system edge seal

#226
19317688
2026-03-17

System and method of injecting accurate quantities of foam into cavities without positive displacement flow meters or flow rate control apparatus

#227
15359870
2019-12-17

Delivery of packages by unmanned aerial vehicles