Inventor
UMEMURA SHUNJI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “UMEMURA SHUNJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
12 patentsUS6244698B1Jun 12, 2001
Printhead unit and ink cartridge
SEIKO EPSON CORP60 citations94
US6283587B1Sep 4, 2001
Printer ink cartridge and ink cartridge device including the same
SEIKO EPSON CORP42 citations92
US6220701B1Apr 24, 2001
Ink cartridge and method of disassembling the same
SEIKO EPSON CORP38 citations92
US6286946B1Sep 11, 2001
Ink cartridge device
SEIKO EPSON CORP34 citations91
US7061699B2Jun 13, 2006
Projection lens, producing method of projection lens and projector having projection lens
SEIKO EPSON CORP30 citations90
US6760096B2Jul 6, 2004
Lens-evaluating method and lens-evaluating apparatus
SEIKO EPSON CORP15 citations84
US6760097B2Jul 6, 2004
Lens evaluation method and lens-evaluating apparatus
SEIKO EPSON CORP7 citations74
US6412933B2Jul 2, 2002
Ink cartridge device
SEIKO EPSON CORP8 citations72
US6829111B2Dec 7, 2004
Projection lens manufacturing apparatus, projection lens manufacturing method, projection lens manufactured by the projection lens manufacturing method and projector having the projection lens
SEIKO EPSON CORP12 citations71
US6250745B1Jun 26, 2001
Ink cartridge for printers
SEIKO EPSON CORP7 citations71
US6989894B2Jan 24, 2006
Lens evaluation method and lens-evaluating apparatus
SEIKO EPSON CORP4 citations63
US6502932B1Jan 7, 2003
Print head device and ink jet printer including the print head device
SEIKO EPSON CORP6 citations62
SONY CORP
5 patentsUS4694330ASep 15, 1987
Color correction circuit
SONY CORP27 citations92
US6674481B1Jan 6, 2004
Display apparatus, marker signal making process, marker signal detector circuit, and control signal generator circuit
SONY CORP14 citations84
US6292216B1Sep 18, 2001
Control signal generating circuit
SONY CORP8 citations73
US5926058AJul 20, 1999
Aperture compensation circuit and RGB monitor
SONY CORP4 citations62
US5331352AJul 19, 1994
Contrast control wherein reference pulse detection occurs every other line period and wherein clamping occurs in remaining line periods
SONY CORP3 citations60