Inventor · disambiguated record
Takuji Hamasaki
Also filed as: HAMASAKI TAKUJI
39 granted patents·4 pending applications·500 citations·filing 1991–2025
98Inventor score
Top patents by PatentIndex Score
43 records- 0194US6104887ALens hoodASAHI OPTICAL CO LTD·Filed 1999·Granted Aug 15, 2000·52 cites·14 claims
- 0289US6269227B1Lens hoodASAHI OPTICAL CO LTD·Filed 2000·Granted Jul 31, 2001·28 cites·17 claims
- 0386US5997187AShutter/diaphragm apparatusASAHI OPTICAL CO LTD·Filed 1997·Granted Dec 7, 1999·28 cites·14 claims
- 0484US7742076B2Image-capturing apparatus and camera-shake compensation mechanismHOYA CORP·Filed 2005·Granted Jun 22, 2010·8 cites·19 claims
- 0584US7088523B2Lens body tubePENTAX CORP·Filed 2005·Granted Aug 8, 2006·14 cites·19 claims
- 0681US6631035B2Varifocal lens barrel and a lens drive mechanismPENTAX CORP·Filed 2002·Granted Oct 7, 2003·25 cites·40 claims
- 0779US6397009B1Zoom lens system and adjusting method of sameASAHI OPTICAL CO LTD·Filed 2000·Granted May 28, 2002·21 cites·5 claims
- 0876US7839053B2One-way rotational transfer mechanism, and ultrasonic rotary drive device incorporating one-way rotational transfer mechanismHOYA CORP·Filed 2008·Granted Nov 23, 2010·5 cites·12 claims
- 0974US6333825B1Vari-focal lensASAHI KOGAKU KOGYO KABUHSIKI K·Filed 2000·Granted Dec 25, 2001·21 cites·10 claims
- 1074US2025172857A1Lens barrel and imaging apparatusNIKON CORP·Filed 2025·Application pending·0 cites
- 1173US6388826B2Device for adjusting the eccentricity of a lens in a frameASAHI OPTICAL CO LTD·Filed 2001·Granted May 14, 2002·15 cites·16 claims
- 1273US5239417ALens barrel for automatic focusing cameraASAHI OPTICAL CO LTD·Filed 1992·Granted Aug 24, 1993·40 cites·27 claims
- 1372US6236523B1Floating lens barrel, lens barrel, and a common lens barrel systemASAHI OPTICAL CO LTD·Filed 2000·Granted May 22, 2001·13 cites·5 claims
- 1470US6747807B2Lens barrelPENTAX CORP·Filed 2002·Granted Jun 8, 2004·13 cites·48 claims
- 1568US6827190B2One-way rotational transfer mechanismPENTAX CORP·Filed 2003·Granted Dec 7, 2004·9 cites·60 claims
- 1667US7184228B2Lens body tubePENTAX CORP·Filed 2005·Granted Feb 27, 2007·4 cites·18 claims
- 1766US7318508B2One-way rotational transfer mechanismPENTAX CORP·Filed 2005·Granted Jan 15, 2008·3 cites·16 claims
- 1866US7102837B2One-way rotational transfer mechanism, and a lens barrel incorporating the samePENTAX CORP·Filed 2004·Granted Sep 5, 2006·10 cites·49 claims
- 1966US5809357AAperture systemASAHI OPTICAL CO LTD·Filed 1997·Granted Sep 15, 1998·9 cites·17 claims
- 2065US6879445B2Power/manual lens barrel having a manual operating ringPENTAX CORP·Filed 2003·Granted Apr 12, 2005·10 cites·43 claims
- 2165US2022128788A1Lens barrel and imaging deviceNIKON CORP·Filed 2019·Application pending·0 cites
- 2264US7099576B2Lens barrel incorporating a one-way rotational transfer mechanismPENTAX CORP·Filed 2004·Granted Aug 29, 2006·9 cites·69 claims
- 2363US12242173B2Lens barrel and imaging apparatusNIKON CORP·Filed 2019·Granted Mar 4, 2025·0 cites·28 claims
- 2463US7213693B2Rotational transfer mechanismPENTAX CORP·Filed 2004·Granted May 8, 2007·7 cites·26 claims
- 2563US5148199AMotor-driven zoom lens barrelASAHI OPTICAL CO LTD·Filed 1991·Granted Sep 15, 1992·25 cites·20 claims
- 2659US7864462B2Interchangeable lens incorporating a lens drive motorHOYA CORP·Filed 2007·Granted Jan 4, 2011·2 cites·10 claims
- 2759US7531942B2Ultrasonic rotary drive deviceHOYA CORP·Filed 2007·Granted May 12, 2009·2 cites·9 claims
- 2859US5708533AZoom lens barrelASAHI OPTICAL CO LTD·Filed 1996·Granted Jan 13, 1998·23 cites·10 claims
- 2955US7201262B2One-way rotational transfer mechanismPENTAX CORP·Filed 2004·Granted Apr 10, 2007·4 cites·40 claims
- 3052US5223980ALens barrel operating mechanismASAHI OPTICAL CO LTD·Filed 1992·Granted Jun 29, 1993·17 cites·10 claims
- 3152US2024402458A1Lens barrel, imaging device, and driving deviceNIKON CORP·Filed 2022·Application pending·0 cites
- 3251US5307104ADevice for adjusting axial position of lensASAHI OPTICAL CO LTD·Filed 1992·Granted Apr 26, 1994·16 cites·8 claims
- 3349US5446593ALens advancing mechanismASAHI OPTICAL CO LTD·Filed 1993·Granted Aug 29, 1995·14 cites·14 claims
- 3449US5155515ACamera having motor-driven zoom lensASAHI OPTICAL CO LTD·Filed 1991·Granted Oct 13, 1992·14 cites·15 claims
- 3544US5867740ACam mechanism for lens barrelASAHI OPTICAL CO LTD·Filed 1992·Granted Feb 2, 1999·11 cites·20 claims
- 3644US5528430ARotatable ring supporting mechanism in lens barrelASAHI OPTICAL CO LTD·Filed 1994·Granted Jun 18, 1996·11 cites·12 claims
- 3744US2006248969A1One-way rotational transfer mechanismPENTAX CORP·Filed 2006·Application pending·0 cites
- 3841US6594088B2Method for molding cam ring with convex cams, molding die assembly, and molded cam ringPENTAX CORP·Filed 2001·Granted Jul 15, 2003·0 cites·8 claims
- 3940US6118601AFloating lens barrel, lens barrel, and a common lens barrel systemASAHI OPTICAL CO LTD·Filed 1998·Granted Sep 12, 2000·7 cites·9 claims
- 4039US10466453B2Optical system and optical device provided therewithNIKON CORP·Filed 2015·Granted Nov 5, 2019·0 cites·10 claims
- 4139US5448414AFocus adjusting apparatus of zoom lensASAHI OPTICAL CO LTD·Filed 1993·Granted Sep 5, 1995·7 cites·18 claims
- 4232US5579173AFocus adjusting apparatus of zoom lensASAHI OPTICAL CO LTD·Filed 1995·Granted Nov 26, 1996·3 cites·18 claims
- 4328US10877236B2Lens barrel and cameraNIKON CORP·Filed 2015·Granted Dec 29, 2020·0 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →