Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848799 | Ribbon bookmark | — | 1989-07-18 |
| 4789472 | Adsorption apparatus | — | 1988-12-06 |
| 4604982 | Controlling and switching mechanism | — | 1986-08-12 |
| 4488530 | Controlling and switching mechanism | — | 1984-12-18 |
| 4352735 | Filter-purifier cartridge | — | 1982-10-05 |
| 4211660 | Filter-purifier cartridge | — | 1980-07-08 |
| 4196086 | Filter-purifier cartridge | — | 1980-04-01 |