Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887589 | Solar energy tracking structure incorporating wind spoilers | Melvin W. Frohardt, Keith H. Hartz | 1989-12-19 |
| 4306387 | Controllable insulating effects by selective interposition of insulating particles in a cavity of an energy transmission panel assembly | Danny L. Hopkins | 1981-12-22 |
| 4243970 | Open circuit alarm | Malin L. Jacobs | 1981-01-06 |