Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953917 | System and method for ensuring the qualification of a workman to perform a task having established required standards | — | 2005-10-11 |
| 4961634 | Infrared achromatic retarder | Russell A. Chipman | 1990-10-09 |
| 4253895 | Method and apparatus for forming a segmented mirror parabolic solar collector trough | — | 1981-03-03 |