Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11236541 | Method and apparatus for convective sill insulation | Peter Strycharske | 2022-02-01 |
| 10767414 | Method and apparatus for convective sill insulation | Peter Strycharske | 2020-09-08 |
| 5408784 | Exterior gasket for operable windows and doors | Fred A. Grunewald | 1995-04-25 |