Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5390629 | Pet toy | — | 1995-02-21 | |
| 4236066 | Voting machine | Charles H. Olmstead | 1980-11-25 | $1,487,000 |
| D255541 | Security screw | Charles H. Olmstead | 1980-06-24 | |
| 4200239 | Machine that quadrates documents | Kalin I. Sheppard | 1980-04-29 | $853,000 |