Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4625703 | Crankcase ventilating system, flow control device therefor and method of making the same | James A. Otto | 1986-12-02 |
| 4458710 | Method of making a valve construction having multiple pistons | — | 1984-07-10 |
| 4425941 | Valve construction having multiple piston means and method of making the same | — | 1984-01-17 |
| 4380251 | Valve construction having multiple piston means and method of making the same | — | 1983-04-19 |
| 4301586 | Method of making a valve construction having multiple piston means | — | 1981-11-24 |
| 4228817 | Valve construction having multiple piston means | — | 1980-10-21 |