Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5458188 | Air conditioning and refrigeration systems utilizing a cryogen and heat pipes | Herman H. Viegas | 1995-10-17 |
| 5365744 | Air conditioning and refrigeration systems utilizing a cryogen | Herman H. Viegas, Dale T. Johnson | 1994-11-22 |
| 5320167 | Air conditioning and refrigeration systems utilizing a cryogen and heat pipes | Dale T. Johnson, Herman H. Viegas | 1994-06-14 |
| 5315840 | Air conditioning and refrigeration methods and apparatus utilizing a cryogen | Herman H. Viegas | 1994-05-31 |
| 5311927 | Air conditioning and refrigeration apparatus utilizing a cryogen | David H. Taylor, Herman H. Viegas | 1994-05-17 |
| 5305825 | Air conditioning and refrigeration apparatus utilizing a cryogen | Herman H. Viegas, David H. Taylor | 1994-04-26 |
| 5287705 | Air conditioning and refrigeration systems utilizing a cryogen | Herman H. Viegas | 1994-02-22 |
| 5285644 | Air conditioning and refrigeration apparatus utilizing a cryogen | Herman H. Viegas | 1994-02-15 |
| 5267443 | Air conditioning and refrigeration methods and apparatus utilizing a cryogen | Herman H. Viegas | 1993-12-07 |
| 5267446 | Air conditioning and refrigeration systems utilizing a cryogen | Herman H. Viegas | 1993-12-07 |
| 5259198 | Air conditioning and refrigeration systems utilizing a cryogen | Herman H. Viegas | 1993-11-09 |
| 5186015 | Transport refrigeration unit and method of operating same | Jay L. Hanson | 1993-02-16 |