Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D281362 | Bowling lane duster | Donald E. Ingermann, Ronald L. Smith, Jimmie L. Knoll, Stephen F. Caffrey, Endre Barsi | 1985-11-12 |
| 4510642 | Combination bowling lane stripper and duster | Donald E. Ingermann, Ronald L. Smith, Jimmie L. Knoll, Stephen F. Caffrey, Endre Barsi | 1985-04-16 |