Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5960816 | Adjustable length vent valve system for fuel tanks | Vaughn K. Mills, Rudolph Bergsma, Robert P. Benjey | 1999-10-05 |
| 5954082 | Apparatus and method for calibrating float valve | Robert P. Benjey, Rudolph Bergsma | 1999-09-21 |
| 5605175 | Fluid responsive vent control valve with peel-away opening action | Rudolph Bergsma | 1997-02-25 |
| 5313977 | Fluid-responsive vent control valve with peel-away opening action | Rudolph Bergsma | 1994-05-24 |
| 4688394 | Automotive heater and air conditioner and process therefor | — | 1987-08-25 |