Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D331940 | Felt-tipped pen | Shigeo Shirai | 1992-12-22 |
| D294599 | Marking pen | Shiro Hayashi | 1988-03-08 |
| D294600 | Ballpoint pen | Shiro Hayashi | 1988-03-08 |
| D286546 | Felt tip pen | — | 1986-11-04 |
| D275687 | Rotary stamp | — | 1984-09-25 |
| D268187 | Rotary stamp | — | 1983-03-08 |
| D265741 | Felt pen | — | 1982-08-10 |
| D260656 | Felt pen | — | 1981-09-08 |
| D260657 | Felt pen | — | 1981-09-08 |