Inventor
KATSUMATA MASAO
JP10 patents
⚠️ This page may combine multiple inventors who share the name “KATSUMATA MASAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
6 patentsUS6829090B2Dec 7, 2004
Prism, projection device and optical component
SONY CORP65 citations96
US7130120B2Oct 31, 2006
Prism, projection and optical component
SONY CORP25 citations92
US5844637ADec 1, 1998
Projection apparatus with a polarizer, glass panel, and quarter-waveplate at light exit side of liquid crystal
SONY CORP27 citations92
US6921176B2Jul 26, 2005
Illuminating optical system, image display unit and method of illuminating space modulation element
SONY CORP19 citations84
US6648474B2Nov 18, 2003
Projection apparatus
SONY CORP16 citations84
US7198376B2Apr 3, 2007
Illumination optical unit liquid crystal projector and production method of liquid crystal projector
SONY CORP9 citations71
HITACHI LTD
4 patentsUS4663607AMay 5, 1987
Magnetoresistive element
HITACHI LTD64 citations96
US4802043AJan 31, 1989
Magneto-resistive head for protecting against output spike noises
HITACHI LTD48 citations92
US5181149AJan 19, 1993
Magnetic recording/reproducing head assembly
HITACHI LTD32 citations91
US5032943AJul 16, 1991
Magnetoresistive head having controlled reproduction output characteristics
HITACHI LTD5 citations60