Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7911697 | Zoom lens and imaging apparatus | Motoyuki Ohtake, Ken Tanaka, Tsutomu Naitou, Takuya Tsutsumi, Tatsuyuki Takahashi | 2011-03-22 |
| 7742231 | Zoom lens and imaging apparatus | Motoyuki Ohtake, Ken Tanaka, Tsutomu Naitou, Takuya Tsutsumi, Tatsuyuki Takahashi | 2010-06-22 |
| 7668335 | Communication device, digital signature verification method and digital signature generation method | Makoto Hamatsu, Mao Asai | 2010-02-23 |
| 7586682 | Zoom lens and imaging apparatus | Motoyuki Ohtake, Ken Tanaka, Takuya Tsutsumi, Tatsuyuki Takahashi, Tsutomu Naitou | 2009-09-08 |
| 7411731 | Zoom lens and imaging apparatus | Motoyuki Ohtake, Tsutomu Naitou, Takuya Tsutsumi, Ken Tanaka, Tatsuyuki Takahashi | 2008-08-12 |
| 6616729 | Method of grain refining cast magnesium alloy | Tetsuichi Motegi, Kiichi Miyazaki, Yoshitomo Tezuka, Kiyotaka Yoshihara | 2003-09-09 |
| 5529475 | Extruder for rubbery materials | — | 1996-06-25 |
| 5282584 | Belt-like material winding system | — | 1994-02-01 |
| 5223280 | Apparatus for taking residual solid matter out of extrusion head | Masayuki Ogata, Yukio Usui | 1993-06-29 |
| 5034832 | Adaptor for a small-sized tape cassette | Seizi Sato | 1991-07-23 |
| 5016834 | Adaptor for a small-sized tape cassette | Seizi Sato | 1991-05-21 |
| 4895507 | Die assembly exchanging apparatus for extruder | — | 1990-01-23 |
| 4891726 | Rotary magnetic head and guide drum assembly with reduce mounting height | Hisashi Suwa, Seiji Sato, Susumu Matsubara, Katsuyuki Koizumi | 1990-01-02 |
| 4853804 | Magnetic recording and/or reproducing apparatus | Hisashi Suwa, Seiji Sato, Susumu Matsubara, Katsuyuki Koizumi | 1989-08-01 |