Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5543224 | High molecular electret film | Masanori Kawasumi | 1996-08-06 |
| 5244470 | Method for marking a water-absorptive contact lens: dyeing dry lens with a mark using reduced vat dye and then making the dye insoluble | Koji Onda, Yasuhiro Yokoyama, Takanori Shibata, Yasuyuki Kato | 1993-09-14 |
| 5055929 | Ghost canceler for television and video tape recorder | — | 1991-10-08 |