Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6533772 | Guide wire torque device | Charles R. Sherts | 2003-03-18 |
| 6106255 | High efficiency rotary vane motor | Herman H. Viegas | 2000-08-22 |
| 6086347 | Two-stage rotary vane motor | Antonin Ryska, Jiri Ota, Herman H. Viegas | 2000-07-11 |
| 5947712 | High efficiency rotary vane motor | Herman H. Viegas | 1999-09-07 |
| 5415014 | Refrigerant receiver tank assembly | William L. Waldschmidt, William P. Maxwell | 1995-05-16 |
| 5322331 | Hose coupling and method of constructing same | William L. Waldschmidt | 1994-06-21 |
| 4834572 | Mounting clamp | Robert L. Harrington, Dennis F. Feldhake, Bradley G. Ellingson | 1989-05-30 |
| 4770002 | Transport refrigeration system | Herman H. Viegas, Robert K. Havemann | 1988-09-13 |