Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860541 | Two stage relief valve for master cylinder quick-fill chamber | — | 1989-08-29 |
| 4821519 | Primary pressure-balanced proportioning valve | Robert F. Gaiser, Donald A. Crumb | 1989-04-18 |