Inventor
KATSUMA RYOJI
JP11 patents
⚠️ This page may combine multiple inventors who share the name “KATSUMA RYOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
5 patentsUS7188973B2Mar 13, 2007
Optical image projector and light source device for optical image projector
SEIKO EPSON CORP23 citations91
US7911694B1Mar 22, 2011
Screen
SEIKO EPSON CORP8 citations83
US7052147B2May 30, 2006
Light source, and projector provided with the light source
SEIKO EPSON CORP16 citations83
US8023186B2Sep 20, 2011
Screen
SEIKO EPSON CORP5 citations62
US7948679B2May 24, 2011
Screen and projector
SEIKO EPSON CORP0 citations51