Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873946 | Two-cycle internal combustion engine | Takashi Fukuoka, Fujio Kobayashi | 1989-10-17 |
| 4871230 | Single mode phosphate laser glass fiber | Toshiharu Yamashita, Sho Amano, Hidemi Tajima, Tetsuro Izumitani | 1989-10-03 |
| 4838116 | Crank | Yasuo Saito, Tadashi Ozaki | 1989-06-13 |