Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D350116 | Computer for visually impaired persons | — | 1994-08-30 |
| 4667959 | Apparatus for storing and selecting cards | Arthur M. Pfeiffer, Christopher Tacklind, Michael D. Haas | 1987-05-26 |
| D260138 | Photograpic timer | Darwin E. Chapman | 1981-08-11 |