Inventor · disambiguated record
Yoshikazu Hirayama
Also filed as: HIRAYAMA YOSHIKAZU
8 granted patents·3 pending applications·520 citations·filing 1991–2014
88Inventor score
Top patents by PatentIndex Score
11 records- 0196US7778508B2Image display optical system, image display unit, illuminating optical system, and liquid crystal display unitNIKON CORP·Filed 2005·Granted Aug 17, 2010·168 cites·17 claims
- 0294US5311173ANavigation system and method using map dataHITACHI LTD·Filed 1991·Granted May 10, 1994·168 cites·35 claims
- 0391US6708150B1Speech recognition apparatus and speech recognition navigation apparatusZANAVI INFORMATICS CORP·Filed 2000·Granted Mar 16, 2004·143 cites·13 claims
- 0467US5422639ANavigation equipment which determines current position dependent on difference between calculated value of self-contained navigation and measured value of radio navigationZANAVY INFORMATICS KK·Filed 1993·Granted Jun 6, 1995·31 cites·10 claims
- 0561US9395525B2Catadioptric imaging lensNIKON CORP·Filed 2013·Granted Jul 19, 2016·1 cites·12 claims
- 0659US7295923B2Navigation device and address input method thereofZANAVY INFORMATICS KK·Filed 2007·Granted Nov 13, 2007·3 cites·6 claims
- 0749US6950797B1Voice reference apparatus, recording medium recording voice reference control program and voice recognition navigation apparatusZANAVY INFORMATICS KK·Filed 2000·Granted Sep 27, 2005·6 cites·15 claims
- 0847US9535240B2Zoom optical systemNIKON CORP·Filed 2014·Granted Jan 3, 2017·0 cites·15 claims
- 0943US2004167781A1Voice output unit and navigation systemFiled 2004·Application pending·0 cites
- 1040US2007070859A1Optical elements and combiner optical systems and image-display units comprising sameNIKON CORP·Filed 2006·Application pending·0 cites
- 1140US2007008624A1Optical image display system and image display unitNIKON CORP·Filed 2006·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →