Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889317 | Proportional flow control valve | — | 1989-12-26 |
| 4858887 | Valve and valve roller sealing | Ian McKenzie | 1989-08-22 |
| 4842245 | Valve | — | 1989-06-27 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889317 | Proportional flow control valve | — | 1989-12-26 |
| 4858887 | Valve and valve roller sealing | Ian McKenzie | 1989-08-22 |
| 4842245 | Valve | — | 1989-06-27 |