Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4494256 | Motorized pool cover | Carl T. Radtke, Ewald A. Kaiser, Siegfried M. Biedermann | 1985-01-22 |
| 4312157 | Greenhouse with hinged roof sections | Roger D. Hertel | 1982-01-26 |