Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867770 | Filter cartridge | — | 1989-09-19 |
| D299765 | Helmet or similar article | Stephen B. Lewis, Cyril Smith | 1989-02-07 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867770 | Filter cartridge | — | 1989-09-19 |
| D299765 | Helmet or similar article | Stephen B. Lewis, Cyril Smith | 1989-02-07 |