TH

Takuji Hamasaki

PE Pentax: 20 patents #79 of 761Top 15%
PE Pentax: 12 patents #31 of 396Top 8%
HO Hoya: 4 patents #305 of 1,290Top 25%
NI Nikon: 3 patents #1,048 of 2,493Top 45%
Overall (All Time): #80,975 of 4,157,543Top 2%
39
Patents All Time

Issued Patents All Time

Showing 26–39 of 39 patents

Patent #TitleCo-InventorsDate
6104887 Lens hood Kazuhiro Hattori 2000-08-15
5997187 Shutter/diaphragm apparatus 1999-12-07
5867740 Cam mechanism for lens barrel 1999-02-02
5809357 Aperture system 1998-09-15
5708533 Zoom lens barrel 1998-01-13
5579173 Focus adjusting apparatus of zoom lens Zenichi Okura 1996-11-26
5528430 Rotatable ring supporting mechanism in lens barrel 1996-06-18
5448414 Focus adjusting apparatus of zoom lens Zenichi Okura 1995-09-05
5446593 Lens advancing mechanism Zenichi Okura 1995-08-29
5307104 Device for adjusting axial position of lens 1994-04-26
5239417 Lens barrel for automatic focusing camera Haruki Eguchi, Kenji Watanabe, Katsumori Kikuchi, Hiroaki Suzuki, Morio Takizawa +1 more 1993-08-24
5223980 Lens barrel operating mechanism 1993-06-29
5155515 Camera having motor-driven zoom lens Shinsuke Kohmoto, Hiroaki Suzuki 1992-10-13
5148199 Motor-driven zoom lens barrel Shinsuke Kohmoto, Tetsuo Sekiguchi 1992-09-15