Issued Patents 2020
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D903089 | Low profile vent | Robert B. Holland | 2020-11-24 |
| D884143 | Roof vent | Robert B. Holland, Rochelle D. Wellhausen-Grimm | 2020-05-12 |
| 10584496 | Roof ridge vent and associated method | Robert B. Holland, Rochelle D. Wellhausen-Grimm | 2020-03-10 |