Inventor
SHIBATA YOJI
JP31 patents
⚠️ This page may combine multiple inventors who share the name “SHIBATA YOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
25 patentsUS5477546ADec 19, 1995
Teleconference terminal equipment and teleconference module
HITACHI LTD160 citations99
US4972462ANov 20, 1990
Multimedia mail system
HITACHI LTD312 citations99
US5541639AJul 30, 1996
Video conference system automatically started at reserved time
HITACHI LTD130 citations98
US5365265ANov 15, 1994
Multipoint teleconference system employing communication channels set in ring configuration
HITACHI LTD153 citations98
US5790178AAug 4, 1998
Picture codec for teleconference equipment, which forms and displays picture-in-frame including at least two of received motion picture, a received still picture and a self motion picture in an optional combination
HITACHI LTD36 citations96
US5689300ANov 18, 1997
Picture codec and teleconference terminal equipment
HITACHI LTD45 citations96
US5604738AFeb 18, 1997
Multipoint teleconference system employing H. 221 frames
HITACHI LTD54 citations96
US5402418AMar 28, 1995
Multipoint teleconference system employing H. 221 frames
HITACHI LTD66 citations96
US4873715AOct 10, 1989
Automatic data/voice sending/receiving mode switching device
HITACHI LTD68 citations96
US5396269AMar 7, 1995
Television telephone
HITACHI LTD66 citations95
US4538176AAug 27, 1985
Buffer memory dispersion type video/audio transmission system
HITACHI LTD201 citations95
US4518989AMay 21, 1985
Buffer memory dispersion type video/audio transmission system with spatially and timewise divided inter-office junction lines
HITACHI LTD175 citations93
US5936945AAug 10, 1999
Teleconference module with video codec for motion picture data
HITACHI LTD31 citations92
US5835923ANov 10, 1998
Contents information transmitting/viewing system and method therefor
HITACHI LTD103 citations92
US5777663AJul 7, 1998
Picture codec and teleconference terminal equipment
HITACHI LTD25 citations92
US5606554AFeb 25, 1997
Teleconference terminal equipment and teleconference module
HITACHI LTD22 citations92
US5966164AOct 12, 1999
Television telephone
HITACHI LTD25 citations91
US5677727AOct 14, 1997
Television telephone
HITACHI LTD34 citations91
US5444477AAug 22, 1995
Video telephone system
HITACHI LTD34 citations91
US5373316ADec 13, 1994
Video conference device with facsimile function
HITACHI LTD27 citations88
US5970054AOct 19, 1999
Multipoint teleconference system employing H. 221 frames
HITACHI LTD14 citations82
US6285391B1Sep 4, 2001
Picture codec and teleconference terminal equipment
HITACHI LTD7 citations74
US6249309B1Jun 19, 2001
Picture codec and teleconference terminal equipment
HITACHI LTD6 citations74
US4970716ANov 13, 1990
Protocol integrating videotex communication system
HITACHI LTD9 citations74
US4389310AJun 21, 1983
Cold trap
HITACHI LTD2 citations57
NIPPON TELEGRAPH & TELEPHONE
3 patentsUS4295154AOct 13, 1981
Digital video and audio file system
NIPPON TELEGRAPH & TELEPHONE82 citations91
US4251691AFeb 17, 1981
Picture/audio signal transmission system
NIPPON TELEGRAPH & TELEPHONE139 citations91
US4734765AMar 29, 1988
Video/audio information transmission system
NIPPON TELEGRAPH & TELEPHONE77 citations90