Inventor
UMEZAWA KOICHI
JP15 patents
⚠️ This page may combine multiple inventors who share the name “UMEZAWA KOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS5491507AFeb 13, 1996
Video telephone equipment
HITACHI LTD420 citations98
US6290360B1Sep 18, 2001
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD59 citations95
USD730894SJun 2, 2015
Magnetic disc storage unit for electronic computer
HITACHI LTD18 citations92
US6783245B2Aug 31, 2004
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD17 citations92
US5819185AOct 6, 1998
Portable satellite communication apparatus
HITACHI LTD41 citations87
USD733135SJun 30, 2015
Magnetic disk storage unit for electronic computer
HITACHI LTD11 citations83
USD733134SJun 30, 2015
Magnetic disk storage unit for electronic computer
HITACHI LTD13 citations83
USD809409SFeb 6, 2018
Breath alcohol content analyzer
HITACHI LTD2 citations73
US6824273B2Nov 30, 2004
Liquid crystal projector, and projection lens unit, optical unit and cooling system for the same
HITACHI LTD9 citations73