Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843820 | Brake system in-line fast fill valve | Robert F. Gaiser | 1989-07-04 |
| 4821519 | Primary pressure-balanced proportioning valve | Robert F. Gaiser, John E. Steer | 1989-04-18 |
| 4815292 | Multi-part primary pressure-balanced proportioning valve with brake pressure failure switch | Robert F. Gaiser, William F. Dillon, Jr. | 1989-03-28 |