Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304840 | Marking pen | Keiichi Mizutani | 1989-11-28 |
| D302175 | Marking pen | Keiichi Mizutani | 1989-07-11 |
| D301488 | Marking pen | Keiichi Mizutani | 1989-06-06 |
| D301252 | Marking pen | Keiichi Mizutani | 1989-05-23 |
| 4801247 | Variable displacement piston pump | Toshio Hashimoto, Susumu Yoshino, Masao Egi, Yasuyuki Shingu, Takashi Yoshioka +1 more | 1989-01-31 |