Inventor
OUCHI HIROBUMI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “OUCHI HIROBUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
6 patentsUS4242695ADec 30, 1980
Low dark current photo-semiconductor device
HITACHI LTD35 citations91
US4367483AJan 4, 1983
Optical semiconductor device
HITACHI LTD19 citations79
US4816890AMar 28, 1989
Optoelectronic device
HITACHI LTD7 citations73
US4346395AAug 24, 1982
Light detecting photodiode-MIS transistor device
HITACHI LTD16 citations73
US4740819AApr 26, 1988
Photo semiconductor device
HITACHI LTD17 citations71
US4563764AJan 7, 1986
Semiconductor laser device
HITACHI LTD3 citations62
RICOH PRINTING SYS LTD
3 patentsUS7144667B2Dec 5, 2006
Electrostatic charge image developing toner, and developer, image forming apparatus and image forming method using the same toner
RICOH PRINTING SYS LTD2 citations62
US7570904B2Aug 4, 2009
Image forming apparatus
RICOH PRINTING SYS LTD3 citations61
US7435519B2Oct 14, 2008
Electrophotographic toner and image forming apparatus
RICOH PRINTING SYS LTD0 citations40