Inventor · disambiguated record
Masakazu Yamagata
Also filed as: YAMAGATA MASAKAZU
12 granted patents·220 citations·filing 1980–2001
91Inventor score
Files withASAHI OPTICAL CO LTD5ASAHI SEIMITSU KK3CASIO COMPUTER CO LTD1OKI DATA KK1PENTAX PREC CO LTD1
Top patents by PatentIndex Score
12 records- 0175US6059866AAir washerSANKI ENG CO LTD·Filed 1998·Granted May 9, 2000·61 cites·4 claims
- 0269US5600488AProjection lens assembly and projectorCASIO COMPUTER CO LTD·Filed 1995·Granted Feb 4, 1997·34 cites·16 claims
- 0366US6078442AND filterASAHI SEIMITSU KK·Filed 1998·Granted Jun 20, 2000·31 cites·14 claims
- 0464US6384944B1Integral transmitter-receiver optical communication apparatusASAHI SEIMITSU KK·Filed 1999·Granted May 7, 2002·35 cites·11 claims
- 0554US4979808AEndoscope objective lens systemASAHI OPTICAL CO LTD·Filed 1988·Granted Dec 25, 1990·16 cites·12 claims
- 0647US4289385APhotographic lens with rear stop diaphragmASAHI OPTICAL CO LTD·Filed 1980·Granted Sep 15, 1981·11 cites·7 claims
- 0742US4653876AClose-up lens systemASAHI OPTICAL CO LTD·Filed 1985·Granted Mar 31, 1987·10 cites·5 claims
- 0839US4874220AViewing optical system for use with endoscopeASAHI OPTICAL CO LTD·Filed 1988·Granted Oct 17, 1989·8 cites·3 claims
- 0935US4770516ATelephoto lens system capable of closeup shootingASAHI OPTICAL CO LTD·Filed 1987·Granted Sep 13, 1988·6 cites·10 claims
- 1034US6701093B1Integral transmitter-receiver optical communication apparatus and a crosstalk preventive device thereforPENTAX PREC CO LTD·Filed 1999·Granted Mar 2, 2004·7 cites·6 claims
- 1129US6141144AOptical axis correcting systemASAHI SEIMITSU KK·Filed 1999·Granted Oct 31, 2000·1 cites·7 claims
- 1228US6666598B2Ribbon cassette, ribbon cartridge using ribbon protector, and printer using ribbon cassette and ribbon cartridgeOKI DATA KK·Filed 2001·Granted Dec 23, 2003·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →