Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4586489 | Semi-concentrating solar energy collector | Gerhard W. Voll | 1986-05-06 |
| 4226910 | Energy control sheet having insulative properties | Richard R. Dahlen, Richard L. Hansen | 1980-10-07 |
| 4181627 | High fluorescent efficiency zinc oxide crystals and method of making same | Gerhard W. Voll, Kjell I. Hagemark | 1980-01-01 |