Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643247 | Method for recording information in optical information medium and reproducing information therefrom | — | 2003-11-04 |
| 6456575 | Method for recording information in optical information medium and reproducing information therefrom | — | 2002-09-24 |
| 5013635 | Information storage medium | Hideki Ohkawa, Norio Ozawa, Motonari Matsubara | 1991-05-07 |
| 4696721 | Electroforming method and electroforming apparatus | Hideki Ohkawa | 1987-09-29 |