Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845869 | Advertising display unit for a public telephone | — | 1989-07-11 |
| 4821467 | Control system for liquid propelled abrasive cleaning | Jerry P. Woodson, Bryce T. Baker | 1989-04-18 |
| 4817342 | Water/abrasive propulsion chamber | Jerry P. Woodson | 1989-04-04 |