Inventor
YAMAKAWA HIDEMASA
JP13 patents
⚠️ This page may combine multiple inventors who share the name “YAMAKAWA HIDEMASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
12 patentsUS6619800B1Sep 16, 2003
Projector comprising a polarizer attached to a transmissive flexible plate material that bends responsive to changes in the shape of the polarizer
SEIKO EPSON CORP20 citations92
US6481850B1Nov 19, 2002
Projector
SEIKO EPSON CORP17 citations84
US6491397B2Dec 10, 2002
Illumination optical system and projector using the same
SEIKO EPSON CORP11 citations73
US7216991B2May 15, 2007
Lighting unit and projector including the same
SEIKO EPSON CORP7 citations72
US7329007B2Feb 12, 2008
Projector
SEIKO EPSON CORP2 citations62
US7267443B2Sep 11, 2007
Light-modulating projector
SEIKO EPSON CORP2 citations62
US7123311B2Oct 17, 2006
Projector with a micro lens array
SEIKO EPSON CORP6 citations61
US7086743B2Aug 8, 2006
Rear projection type projector and its method of use
SEIKO EPSON CORP6 citations61
US12449168B2Oct 21, 2025
Positive displacement machine, compressor, cooling device, and electronic apparatus
SEIKO EPSON CORP0 citations60
US12529362B2Jan 20, 2026
Positive displacement machine, compressor, cooling apparatus, and electronic equipment
SEIKO EPSON CORP0 citations51
US7390095B2Jun 24, 2008
Projector
SEIKO EPSON CORP0 citations51
US7156523B2Jan 2, 2007
Projector
SEIKO EPSON CORP0 citations41