Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11578528 | Sill systems for sliding fenestration units | Howard C. Anderson, Andy Breuer, Joseph A. Ritzert, Paul D. Schroder, Jaden P. Vos | 2023-02-14 |
| 10612295 | Door system and method of making | Joseph A. Ritzert, Earl J. Ratcliff, Cory Brown | 2020-04-07 |
| 9556665 | Door system and method of making | Joseph A. Ritzert, Earl J. Ratcliff, Cory Brown | 2017-01-31 |
| 5110649 | Separable fasteners for attachment to other objects | George A. Provost | 1992-05-05 |
| 5061540 | Separable fasteners for attachment to other objects | Humphrey Cripps, Gerald Rocha, William J. Kennedy | 1991-10-29 |