Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622136 | Boat canopy mounting system | Albert W. Zirkelbach, Donald A. Zirkelbach | 1997-04-22 |
| 5425327 | Boat canopy mounting system | Albert W. Zirkelbach, Donald A. Zirkelbach | 1995-06-20 |
| 5189980 | Rounded top header extrusion for boat windshields | Albert W. Zirkelbach, Donald A. Zirkelbach | 1993-03-02 |
| D324368 | Rounded top header extrusion for boat windshields | Albert W. Zirkelbach, Donald A. Zirkelbach | 1992-03-03 |
| 4993351 | Rounded top header extrusion for boat windshields | Albert W. Zirkelbach, Donald A. Zirkelbach | 1991-02-19 |