Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856138 | Bowling lane vacuum with floating head | Donald E. Ingermann, Stephen F. Caffrey, Ronald L. Smith, Ronald G. Sullivan | 1989-08-15 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856138 | Bowling lane vacuum with floating head | Donald E. Ingermann, Stephen F. Caffrey, Ronald L. Smith, Ronald G. Sullivan | 1989-08-15 |