Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10391716 | Articulating vacuum plate system and related method | William J. Kuiper | 2019-08-27 |
| 9540823 | Ridge vent with external-flexion vanes | — | 2017-01-10 |
| 8935895 | Rollable ridge vent panel | — | 2015-01-20 |
| 6491581 | Roof ventilator and filter | — | 2002-12-10 |
| 5096008 | Stand-up wheelchair | — | 1992-03-17 |
| 5070771 | Roof ventilator | — | 1991-12-10 |
| 5050489 | Roof ventilator | — | 1991-09-24 |
| 4903445 | Roof ridge ventilators | — | 1990-02-27 |
| 4676147 | Roof ridge ventilator | — | 1987-06-30 |