Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7226096 | Door handle device for vehicles | Hidehiro Ito, Masakatsu Nitawaki, Hitoshi Kawano | 2007-06-05 |
| 6219191 | Plastic lens | Haruyuki Ohashi | 2001-04-17 |
| 6144500 | Plastic lens | Haruyuki Ohashi | 2000-11-07 |
| 6115175 | UV image forming optical system | Koichi Maruyama, Syunitirou Wakamiya, Shigeo Kubota, Hiroshi Suganuma, Minoru Takeda | 2000-09-05 |
| 6052232 | Molded plastic lens | — | 2000-04-18 |
| 5930032 | UV image forming optical system and lens for UV radiation | Koichi Maruyama | 1999-07-27 |
| 5657168 | Optical system of optical information recording/ reproducing apparatus | Koichi Maruyama | 1997-08-12 |
| 5657171 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-08-12 |
| 5644437 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-07-01 |
| 5638221 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1997-06-10 |
| 5500767 | Objective lens and method of measuring its performance | Koichi Maruyama, Syun'itirou Wakamiya, Masahiro Oono | 1996-03-19 |
| 5491587 | Collimating lens for optical system using semiconductor laser | Koichi Maruyama, Makoto Iki | 1996-02-13 |
| 5479296 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyana | 1995-12-26 |
| 5335059 | Method and apparatus for measuring lens performance | Koichi Maruyuma, Syun'itirou Wakamiya | 1994-08-02 |
| 5321550 | Optical system of optical information recording/reproducing apparatus | Koichi Maruyama | 1994-06-14 |
| 5173809 | Objective lens system of optical information recording/reproducing apparatus | Koichi Maruyama | 1992-12-22 |
| 4956833 | Objective driving device for an optical disk apparatus | Hiroshi Kokado, Suguru Takishima, Koichiro Nishikawa, Junichi Takeda, Masahiko Sasaki +6 more | 1990-09-11 |