Inventor
YAMADA TAKEHIKO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “YAMADA TAKEHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
15 patentsUS5477546ADec 19, 1995
Teleconference terminal equipment and teleconference module
HITACHI LTD160 citations99
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
US5585839ADec 17, 1996
Audio and video telecommunication system with remote monitoring function and remote device control function
HITACHI LTD72 citations93
US5936945AAug 10, 1999
Teleconference module with video codec for motion picture data
HITACHI LTD31 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
US5162644ANov 10, 1992
Contact type image sensor having photoelectric conversion elements to reduce signal variation caused by luminous intensity variation of light source
HITACHI LTD30 citations92
US5745160AApr 28, 1998
Video conversation/monitoring system having a remote monitoring function
HITACHI LTD22 citations90
US6285391B1Sep 4, 2001
Picture codec and teleconference terminal equipment
HITACHI LTD7 citations74
US6249309B1Jun 19, 2001
Picture codec and teleconference terminal equipment
HITACHI LTD6 citations74
US5130822AJul 14, 1992
Method and apparatus for correcting an image signal
HITACHI LTD13 citations73
US4977313ADec 11, 1990
Facsimile equipment with direct-contact-type image sensor
HITACHI LTD11 citations73
US4940888AJul 10, 1990
Direct-contact-type image sensor and image sensor assembly
HITACHI LTD10 citations73
US4996438AFeb 26, 1991
Line image sensor with controlled photosensitivity
HITACHI LTD4 citations62