Inventor · disambiguated record
Masami Shirai
Also filed as: SHIRAI MASAMI
42 granted patents·7 pending applications·977 citations·filing 1989–2005
98Inventor score
Top patents by PatentIndex Score
49 records- 0190US6324024B1Reflector for distance measurementASAHI OPTICAL CO LTD·Filed 1998·Granted Nov 27, 2001·104 cites·21 claims
- 0290US6304079B1Incremental rotary encoder for measuring horizontal or vertical anglesASAHI OPTICAL CO LTD·Filed 2000·Granted Oct 16, 2001·44 cites·10 claims
- 0386US4971034ABody cavity pressure adjusting device for endoscope and laser medical treatment apparatus including body cavity pressure adjusting deviceASAHI OPTICAL CO LTD·Filed 1989·Granted Nov 20, 1990·260 cites·82 claims
- 0484US6622391B1Incremental rotary encoder, and a surveying instrument incorporating a magnetic incremental rotary encoderPENTAX CORP·Filed 2000·Granted Sep 23, 2003·33 cites·27 claims
- 0583US6765653B2Electronic distance meterPENTAX CORP·Filed 2001·Granted Jul 20, 2004·56 cites·17 claims
- 0680US5671466AElectrophotographic apparatus and sheet guide mechanismASAHI OPTICAL CO LTD·Filed 1995·Granted Sep 23, 1997·28 cites·37 claims
- 0780US5321479AElectrophotographic apparatusASAHI OPTICAL CO LTD·Filed 1993·Granted Jun 14, 1994·26 cites·8 claims
- 0875US6492806B2Magnetic encoder and survey instrument having magnetic encoderPENTAX CORP·Filed 2001·Granted Dec 10, 2002·16 cites·10 claims
- 0975US5949548AHeight sensing measurement deviceASAHI OPTICAL CO LTD·Filed 1998·Granted Sep 7, 1999·57 cites·29 claims
- 1072US5528352AElectrophotographic apparatus having original separation meansASAHI OPTICAL CO LTD·Filed 1995·Granted Jun 18, 1996·22 cites·30 claims
- 1171US6480266B2Autofocus distance-measuring optical systemASAHI OPTICAL CO LTD·Filed 2001·Granted Nov 12, 2002·13 cites·13 claims
- 1269US5297787ASheet cassetteASAHI OPTICAL CO LTD·Filed 1993·Granted Mar 29, 1994·18 cites·9 claims
- 1364US6629371B1Surveying instrument incorporating a magnetic incremental rotary encoderPENTAX CORP·Filed 2000·Granted Oct 7, 2003·10 cites·12 claims
- 1464US6550150B1Surveying instrument incorporating a magnetic incremental rotary encoderPENTAX CORP·Filed 2000·Granted Apr 22, 2003·18 cites·7 claims
- 1564US6384405B1Incremental rotary encoderASAHI OPTICAL CO LTD·Filed 2000·Granted May 7, 2002·12 cites·20 claims
- 1664US6072642AFocusing lens position detection apparatus and an auto-focus surveying apparatusASAHI OPTICAL CO LTD·Filed 1999·Granted Jun 6, 2000·34 cites·16 claims
- 1763US7218384B2Surveying systemPENTAX CORP·Filed 2003·Granted May 15, 2007·16 cites·34 claims
- 1862US6580495B2Surveying instrument having a phase-difference detection type focus detecting device and a beam-splitting optical systemPENTAX CORP·Filed 2001·Granted Jun 17, 2003·17 cites·14 claims
- 1961US6555809B2Incremental rotary encoderPENTAX CORP·Filed 2002·Granted Apr 29, 2003·10 cites·20 claims
- 2060US7098997B2Surveying systemPENTAX CORP·Filed 2003·Granted Aug 29, 2006·16 cites·36 claims
- 2159US7075634B2Surveying systemPENTAX CORP·Filed 2003·Granted Jul 11, 2006·13 cites·7 claims
- 2258US5338021APaper feeding mechanismASAHI OPTICAL CO LTD·Filed 1993·Granted Aug 16, 1994·12 cites·16 claims
- 2354US6600308B2Magnetic encoder and method for reducing harmonic distortion thereofPENTAX CORP·Filed 2002·Granted Jul 29, 2003·7 cites·10 claims
- 2453US6556283B2Electronic distance meterPENTAX CORP·Filed 2001·Granted Apr 29, 2003·10 cites·23 claims
- 2553US6532059B2Surveying instrument having an optical distance meterPENTAX CORP·Filed 2001·Granted Mar 11, 2003·10 cites·12 claims
- 2653US6354010B1Surveying instrumentASAHI OPTICAL CO LTD·Filed 1999·Granted Mar 12, 2002·20 cites·21 claims
- 2752US6945657B2Surveying instrumentPENTAX CORP·Filed 2001·Granted Sep 20, 2005·7 cites·8 claims
- 2852US5452072ATransfer unit mounted on a pivotal upper coverASAHI OPTICAL CO LTD·Filed 1994·Granted Sep 19, 1995·9 cites·14 claims
- 2951US6677568B2Surveying instrument having a phase-difference detection type focus detecting devicePENTAX CORP·Filed 2001·Granted Jan 13, 2004·3 cites·7 claims
- 3050US6194694B1Surveying instrumentASAHI OPTICAL CO LTD·Filed 1999·Granted Feb 27, 2001·14 cites·7 claims
- 3149US6717683B1Target for photogrammetric analytical measurement systemPENTAX CORP·Filed 1999·Granted Apr 6, 2004·15 cites·6 claims
- 3248US6747733B2Electronic distance meterPENTAX CORP·Filed 2002·Granted Jun 8, 2004·6 cites·55 claims
- 3347US6339499B1Beam splitter for automatic focusing deviceASAHI OPTICAL CO LTD·Filed 1999·Granted Jan 15, 2002·12 cites·8 claims
- 3446US6469777B2Surveying instrument having an optical distance meterASAHI OPTICAL CO LTD·Filed 2001·Granted Oct 22, 2002·4 cites·39 claims
- 3545US6618126B2Surveying instrument having a sighting telescope and a phase-difference detection type focus detection device thereforPENTAX CORP·Filed 2001·Granted Sep 9, 2003·4 cites·17 claims
- 3645US2005200949A1Surveying instrumentPENTAX CORP·Filed 2005·Application pending·0 cites
- 3744US6914636B2Optical viewer instrument with photographing functionPENTAX CORP·Filed 2002·Granted Jul 5, 2005·0 cites·13 claims
- 3841US6501541B2Electronic distance meterPENTAX CORP·Filed 2001·Granted Dec 31, 2002·2 cites·21 claims
- 3940US5992031AHandgrip supporting mechanism for electric devicesASAHI OPTICAL CO LTD·Filed 1997·Granted Nov 30, 1999·8 cites·26 claims
- 4040US2003151660A1Binocular telescope with photographing functionPENTAX CORP·Filed 2003·Application pending·0 cites
- 4140US2004012852A1Observation optical devicePENTAX CORP·Filed 2003·Application pending·0 cites
- 4239US6501540B2Surveying instrument having an optical distance meterPENTAX CORP·Filed 2001·Granted Dec 31, 2002·2 cites·11 claims
- 4339US2005069195A1Apparatus and method for establishing correspondence between imagesPENTAX CORP·Filed 2004·Application pending·0 cites
- 4439US2003189752A1Portable optical devicePENTAX CORP·Filed 2003·Application pending·0 cites
- 4539US2004150816A1Target for photogrammetric analystical measurement systemPENTAX CORP·Filed 2004·Application pending·0 cites
- 4638US2002015237A1Light interception structure for an automatic focus detection surveying instrumentASAHI OPTICAL CO LTD·Filed 2001·Application pending·0 cites
- 4737US6331918B1Light interception structure for an automatic focus detection surveying instrumentASAHI OPTICAL CO LTD·Filed 1999·Granted Dec 18, 2001·5 cites·17 claims
- 4833US6344639B1Beam splitter for automatic focusing deviceASAHI OPTICAL CO LTD·Filed 1999·Granted Feb 5, 2002·3 cites·18 claims
- 4930US6350975B1Beam splitter for automatic focusing deviceASAHI OPTICAL CO LTD·Filed 1999·Granted Feb 26, 2002·1 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →