Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6562992 | Optical material | Naoki Hayashi, Tomoyoshi Koizumi, Katsuichi Machida | 2003-05-13 |
| RE34927 | Magnetic tape cassette with tape protective closure and lock mechanism | Hiroshi Meguro, Yoshinori Yamamoto, Masao Ohyama, Kenichi Horikawa, Kenji Kawakami | 1995-05-02 |
| 4881137 | Magnetic tape cassette with tape protective closure and lock mechanism | Hiroshi Meguro, Yoshinori Yamamoto, Masao Ohyama, Kenichi Horikawa, Kenji Kawakami | 1989-11-14 |
| 4843510 | Magnetic tape cassette with tape protective closure and lock mechanism | Hiroshi Meguro, Yoshinori Yamamoto, Masao Ohyama, Kenichi Horikawa, Kenji Kawakami | 1989-06-27 |