Inventor
HAMASAKI TAKUJI
JP41 patents
⚠️ This page may combine multiple inventors who share the name “HAMASAKI TAKUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASAHI OPTICAL CO LTD
19 patentsUS6104887AAug 15, 2000
Lens hood
ASAHI OPTICAL CO LTD52 citations96
US6269227B1Jul 31, 2001
Lens hood
ASAHI OPTICAL CO LTD28 citations93
US6397009B1May 28, 2002
Zoom lens system and adjusting method of same
ASAHI OPTICAL CO LTD21 citations92
US5997187ADec 7, 1999
Shutter/diaphragm apparatus
ASAHI OPTICAL CO LTD28 citations92
US5708533AJan 13, 1998
Zoom lens barrel
ASAHI OPTICAL CO LTD23 citations92
US5148199ASep 15, 1992
Motor-driven zoom lens barrel
ASAHI OPTICAL CO LTD25 citations92
US5239417AAug 24, 1993
Lens barrel for automatic focusing camera
ASAHI OPTICAL CO LTD40 citations91
US6388826B2May 14, 2002
Device for adjusting the eccentricity of a lens in a frame
ASAHI OPTICAL CO LTD15 citations84
US6236523B1May 22, 2001
Floating lens barrel, lens barrel, and a common lens barrel system
ASAHI OPTICAL CO LTD13 citations74
US6118601ASep 12, 2000
Floating lens barrel, lens barrel, and a common lens barrel system
ASAHI OPTICAL CO LTD7 citations74
US5867740AFeb 2, 1999
Cam mechanism for lens barrel
ASAHI OPTICAL CO LTD11 citations74
US5809357ASep 15, 1998
Aperture system
ASAHI OPTICAL CO LTD9 citations74
US5528430AJun 18, 1996
Rotatable ring supporting mechanism in lens barrel
ASAHI OPTICAL CO LTD11 citations74
US5448414ASep 5, 1995
Focus adjusting apparatus of zoom lens
ASAHI OPTICAL CO LTD7 citations74
US5446593AAug 29, 1995
Lens advancing mechanism
ASAHI OPTICAL CO LTD14 citations74
US5307104AApr 26, 1994
Device for adjusting axial position of lens
ASAHI OPTICAL CO LTD16 citations74
US5223980AJun 29, 1993
Lens barrel operating mechanism
ASAHI OPTICAL CO LTD17 citations74
US5155515AOct 13, 1992
Camera having motor-driven zoom lens
ASAHI OPTICAL CO LTD14 citations74
US5579173ANov 26, 1996
Focus adjusting apparatus of zoom lens
ASAHI OPTICAL CO LTD3 citations63
PENTAX CORP
12 patentsUS6631035B2Oct 7, 2003
Varifocal lens barrel and a lens drive mechanism
PENTAX CORP25 citations92
US7088523B2Aug 8, 2006
Lens body tube
PENTAX CORP14 citations84
US6747807B2Jun 8, 2004
Lens barrel
PENTAX CORP13 citations84
US7213693B2May 8, 2007
Rotational transfer mechanism
PENTAX CORP7 citations74
US7102837B2Sep 5, 2006
One-way rotational transfer mechanism, and a lens barrel incorporating the same
PENTAX CORP10 citations74
US7099576B2Aug 29, 2006
Lens barrel incorporating a one-way rotational transfer mechanism
PENTAX CORP9 citations74
US6879445B2Apr 12, 2005
Power/manual lens barrel having a manual operating ring
PENTAX CORP10 citations74
US6827190B2Dec 7, 2004
One-way rotational transfer mechanism
PENTAX CORP9 citations74
US7318508B2Jan 15, 2008
One-way rotational transfer mechanism
PENTAX CORP3 citations63
US7201262B2Apr 10, 2007
One-way rotational transfer mechanism
PENTAX CORP4 citations63
US7184228B2Feb 27, 2007
Lens body tube
PENTAX CORP4 citations63
US6594088B2Jul 15, 2003
Method for molding cam ring with convex cams, molding die assembly, and molded cam ring
PENTAX CORP0 citations42
NIKON CORP
5 patentsUS12585078B2Mar 24, 2026
Lens barrel and imaging device
NIKON CORP0 citations62
US12591108B2Mar 31, 2026
Lens barrel and imaging apparatus
NIKON CORP0 citations51
US12242173B2Mar 4, 2025
Lens barrel and imaging apparatus
NIKON CORP0 citations50
US10466453B2Nov 5, 2019
Optical system and optical device provided therewith
NIKON CORP0 citations40
US10877236B2Dec 29, 2020
Lens barrel and camera
NIKON CORP0 citations31
HOYA CORP
4 patentsUS7742076B2Jun 22, 2010
Image-capturing apparatus and camera-shake compensation mechanism
HOYA CORP8 citations84
US7864462B2Jan 4, 2011
Interchangeable lens incorporating a lens drive motor
HOYA CORP2 citations63
US7839053B2Nov 23, 2010
One-way rotational transfer mechanism, and ultrasonic rotary drive device incorporating one-way rotational transfer mechanism
HOYA CORP5 citations63
US7531942B2May 12, 2009
Ultrasonic rotary drive device
HOYA CORP2 citations63