Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882238 | Die for use in forming lens | Akira Doi | 1989-11-21 |
| 4801247 | Variable displacement piston pump | Toshio Hashimoto, Susumu Yoshino, Akira Ohashi, Masao Egi, Yasuyuki Shingu +1 more | 1989-01-31 |