Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5648105 | Apparatus for making a plurality of optical record disc subtrates | Kenji Yamaga, Yoshimi Sakai, Atsushi Koyama, Yuichi NAMIKAWA | 1997-07-15 |
| 5458821 | Method of making a plurality of optical record disc substrates | Kenji Yamaga, Yoshimi Sakai, Atsushi Koyama, Yuichi NAMIKAWA | 1995-10-17 |
| 4382522 | Tape cover of magnetic tape cassette and process for preparing tape cover | Masaoki Sekine | 1983-05-10 |
| 4382523 | Tape cover of magnetic tape cassette and process for preparing tape cover | Masaoki Sekine | 1983-05-10 |