Inventor · disambiguated record
Masao Katsumata
Also filed as: KATSUMATA MASAO
10 granted patents·310 citations·filing 1985–2004
92Inventor score
Top patents by PatentIndex Score
10 records- 0195US4663607AMagnetoresistive elementHITACHI LTD·Filed 1985·Granted May 5, 1987·64 cites·18 claims
- 0294US6829090B2Prism, projection device and optical componentSONY CORP·Filed 2002·Granted Dec 7, 2004·65 cites·22 claims
- 0391US4802043AMagneto-resistive head for protecting against output spike noisesHITACHI LTD·Filed 1986·Granted Jan 31, 1989·48 cites·8 claims
- 0484US7130120B2Prism, projection and optical componentSONY CORP·Filed 2004·Granted Oct 31, 2006·25 cites·17 claims
- 0584US5181149AMagnetic recording/reproducing head assemblyHITACHI LTD·Filed 1989·Granted Jan 19, 1993·32 cites·18 claims
- 0683US6921176B2Illuminating optical system, image display unit and method of illuminating space modulation elementSONY CORP·Filed 2003·Granted Jul 26, 2005·19 cites·6 claims
- 0780US6648474B2Projection apparatusSONY CORP·Filed 2002·Granted Nov 18, 2003·16 cites·17 claims
- 0869US7198376B2Illumination optical unit liquid crystal projector and production method of liquid crystal projectorSONY CORP·Filed 2002·Granted Apr 3, 2007·9 cites·9 claims
- 0963US5844637AProjection apparatus with a polarizer, glass panel, and quarter-waveplate at light exit side of liquid crystalSONY CORP·Filed 1997·Granted Dec 1, 1998·27 cites·6 claims
- 1041US5032943AMagnetoresistive head having controlled reproduction output characteristicsHITACHI LTD·Filed 1989·Granted Jul 16, 1991·5 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Masao Katsumata files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →