Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D299341 | Housing for a key pad, carrier select and credit card bezel for coin telephones | — | 1989-01-10 |
| D299133 | Key pad and credit card bezel for coin telephones | — | 1988-12-27 |
| 4264787 | Hazardous voltage protection circuit | Gary L. Eisenhauer | 1981-04-28 |