Inventor · disambiguated record
Kazunori Ishizuka
Also filed as: ISHIZUKA KAZUNORI
66 granted patents·4 pending applications·738 citations·filing 1998–2011
99Inventor score
Files withPENTAX CORP32HOYA CORP15ASAHI OPTICAL CO LTD14FUJITSU HITACHI PLASMA DISPLAY4FUJI PHOTO OPTICAL CO LTD1
Top patents by PatentIndex Score
70 records- 0193US7338219B2Retractable lens system and a camera incorporating the retractable lens systemPENTAX CORP·Filed 2005·Granted Mar 4, 2008·20 cites·60 claims
- 0292US7773871B2Retractable photographic lensHOYA CORP·Filed 2007·Granted Aug 10, 2010·16 cites·16 claims
- 0391US6835006B2Lens barrel and cameraFUJI PHOTO OPTICAL CO LTD·Filed 2003·Granted Dec 28, 2004·35 cites·16 claims
- 0489US7546029B2Retractable lens systemHOYA CORP·Filed 2005·Granted Jun 9, 2009·12 cites·17 claims
- 0589US6269227B1Lens hoodASAHI OPTICAL CO LTD·Filed 2000·Granted Jul 31, 2001·28 cites·17 claims
- 0688US7753598B2Lens barrelHOYA CORP·Filed 2007·Granted Jul 13, 2010·13 cites·20 claims
- 0788US7265913B2Movable lens control devicePENTAX CORP·Filed 2005·Granted Sep 4, 2007·16 cites·15 claims
- 0888US6522482B2Zoom lens barrel assemblyPENTAX CORP·Filed 2002·Granted Feb 18, 2003·40 cites·14 claims
- 0987US6522481B2Cam structure for zoom lens barrel assemblyPENTAX CORP·Filed 2002·Granted Feb 18, 2003·35 cites·8 claims
- 1087US6522478B2Multi-stage-extension zoom lens barrel assemblyPENTAX CORP·Filed 2002·Granted Feb 18, 2003·37 cites·7 claims
- 1187US6055116AMulti-stage extension type zoom lens barrelASAHI OPTICAL CO LTD·Filed 1998·Granted Apr 25, 2000·84 cites·12 claims
- 1286US7860383B2Imaging deviceHOYA CORP·Filed 2009·Granted Dec 28, 2010·14 cites·12 claims
- 1386US7507040B2Retractable lens systemHOYA CORP·Filed 2005·Granted Mar 24, 2009·15 cites·25 claims
- 1486US7492536B2Movable lens control deviceHOYA CORP·Filed 2007·Granted Feb 17, 2009·12 cites·5 claims
- 1585US7780362B2Retracting mechanism of a lens barrelHOYA CORP·Filed 2009·Granted Aug 24, 2010·13 cites·13 claims
- 1685US7777976B2Imaging deviceHOYA CORP·Filed 2009·Granted Aug 17, 2010·14 cites·9 claims
- 1783US7408722B2Cam mechanism of a zoom lensHOYA CORP·Filed 2005·Granted Aug 5, 2008·12 cites·8 claims
- 1883US7230773B2Drive mechanism of a zoom lensPENTAX CORP·Filed 2005·Granted Jun 12, 2007·12 cites·12 claims
- 1982US6855026B2Method for forming partitions of plasma display panel by using sandblasting processFUJITSU LTD·Filed 2003·Granted Feb 15, 2005·13 cites·14 claims
- 2081USRE42405EMethod for forming partitions of plasma display panel by using sandblasting processFUJITSU HITACHI PLASMA DISPLAY·Filed 2008·Granted May 31, 2011·4 cites·47 claims
- 2181US6369962B1Zoom lens barrelASAHI OPTICAL CO LTD·Filed 2000·Granted Apr 9, 2002·23 cites·20 claims
- 2276US6853503B2Eccentricity-prevention mechanism for a pair of lens-supporting ringsPENTAX CORP·Filed 2001·Granted Feb 8, 2005·17 cites·8 claims
- 2375US7356251B2Assembly-stage focus adjustment mechanism of a zoom lensPENTAX CORP·Filed 2005·Granted Apr 8, 2008·4 cites·11 claims
- 2474US7499637B2Cam mechanism of a zoom lensHOYA CORP·Filed 2005·Granted Mar 3, 2009·4 cites·13 claims
- 2574US6751032B2Lens barrelPENTAX CORP·Filed 2002·Granted Jun 15, 2004·15 cites·15 claims
- 2673US6778334B2Lens barrelPENTAX CORP·Filed 2002·Granted Aug 17, 2004·14 cites·15 claims
- 2773US6714362B2Lens shutter mechanismPENTAX CORP·Filed 2002·Granted Mar 30, 2004·10 cites·17 claims
- 2871US7773313B2Cam mechanism of a retractable zoom lensHOYA CORP·Filed 2009·Granted Aug 10, 2010·5 cites·12 claims
- 2970US6392828B1Zoom lens barrelASAHI OPTICAL CO LTD·Filed 2000·Granted May 21, 2002·12 cites·10 claims
- 3069US7436602B2Lens barrelHOYA CORP·Filed 2007·Granted Oct 14, 2008·5 cites·11 claims
- 3169US6661970B2Lens barrelPENTAX CORP·Filed 2002·Granted Dec 9, 2003·11 cites·11 claims
- 3268US7872810B2Light shielding structure of an optical deviceHOYA CORP·Filed 2009·Granted Jan 18, 2011·4 cites·18 claims
- 3368US6369956B1Zoom lens barrelASAHI OPTICAL CO LTD·Filed 2000·Granted Apr 9, 2002·11 cites·13 claims
- 3467US6014269AEngaging structure of relatively-rotatable cylindrical membersASAHI OPTICAL CO LTD·Filed 1998·Granted Jan 11, 2000·30 cites·24 claims
- 3565US7835088B2Light shielding structure of an optical deviceHOYA CORP·Filed 2009·Granted Nov 16, 2010·3 cites·14 claims
- 3665US6809884B2Zoom lens barrel assemblyPENTAX CORP·Filed 2002·Granted Oct 26, 2004·9 cites·9 claims
- 3765US6687459B2FPC mounting structurePENTAX CORP·Filed 2002·Granted Feb 3, 2004·6 cites·13 claims
- 3864US6721111B2Lens guide mechanismPENTAX CORP·Filed 2002·Granted Apr 13, 2004·8 cites·13 claims
- 3963US6657793B2Lens barrelPENTAX CORP·Filed 2001·Granted Dec 2, 2003·8 cites·5 claims
- 4062US6741401B2Lens barrelPENTAX CORP·Filed 2002·Granted May 25, 2004·7 cites·13 claims
- 4158USRE41312EMethod for forming partitions of plasma display panel by using sandblasting processFUJITSU HITACHI PLASMA DISPLAY·Filed 2007·Granted May 4, 2010·0 cites·16 claims
- 4258US6335834B1Barrel having cam groove and helicoidASAHI OPTICAL CO LTD·Filed 2000·Granted Jan 1, 2002·5 cites·10 claims
- 4356US6795251B2Lens drive mechanismPENTAX CORP·Filed 2001·Granted Sep 21, 2004·5 cites·8 claims
- 4456US6115189AMulti-stage extension type zoom lens barrelASAHI OPTICAL CO LTD·Filed 1998·Granted Sep 5, 2000·19 cites·6 claims
- 4555US6850701B2Camera having lens barrierPENTAX CORP·Filed 2002·Granted Feb 1, 2005·3 cites·15 claims
- 4654US6919670B2Rib structure for display device and its manufacture processFUJITSU HITACHI PLASMA DISPLAY·Filed 2001·Granted Jul 19, 2005·2 cites·27 claims
- 4754US2007109670A1Cam mechanism of a telescoping lens barrelPENTAX CORP·Filed 2006·Application pending·0 cites
- 4851US8027102B2Cam mechanism of a telescoping lens barrelHOYA CORP·Filed 2010·Granted Sep 27, 2011·0 cites·14 claims
- 4951US6717744B2Lens barrelPENTAX CORP·Filed 2002·Granted Apr 6, 2004·3 cites·10 claims
- 5051US5956189ALinear guiding mechanism of a zoom lens barrelASAHI OPTICAL CO LTD·Filed 1998·Granted Sep 21, 1999·15 cites·11 claims
Showing the top 50 of 70 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Kazunori Ishizuka 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 →