Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637579 | Railroad switch mechanism | — | 1987-01-20 |
| RE31987 | Automatic lamp bulb changer for signal lamps | Larry Appleman, Warren R. Alexander | 1985-09-17 |
| 4402038 | Automatic lamp bulb changer for signal lamps | Larry Appleman, Warren R. Alexander | 1983-08-30 |