Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9822526 | General purpose insulation bag | David M. Cook, Paul B. Machacek | 2017-11-21 |
| 8931215 | Attic stairway insulator assembly | David M. Cook, Anthony L. Rockwell, Fawn M. Uhl, Harry Alter, Paul B. Machacek | 2015-01-13 |