Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7179536 | Optical element having a low surface roughness, an optical pickup device including the optical element, and a die for making the optical element | Shigeru Hosoe | 2007-02-20 |
| 6637656 | Optical reading apparatus and optical reading method | Tatsuji Kurogama, Nobuyuki Baba | 2003-10-28 |
| 6414751 | Displacement measurement apparatus | Tatsuji Kurogama, Norikazu Arai | 2002-07-02 |
| 5202992 | Zoom lens apparatus | Nobuyuki Adachi, Hiroshi Miyamae, Kiichirou Ueda | 1993-04-13 |
| 4830475 | Focusing means for a zoom lens group | Shozo Ishiyama, Tadashi Kojima | 1989-05-16 |
| 4637690 | Telecentric zoom lens system | Hiroshi Miyamae | 1987-01-20 |