Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878785 | Abrasive fluid flow | David H. Saunders | 1989-11-07 |
| 4854090 | Feeding abrasive material | David H. Saunders, Robert M. Fairhurst | 1989-08-08 |
| 4836498 | Liquid flow control assembly | Martin Lawrence Hughes, Ian Hansford | 1989-06-06 |