Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10639577 | Clogged dust filter monitor | David J. Wilson, Jr., David Daniel Walker | 2020-05-05 |
| 9061229 | Detector for clogged filters | David J. Wilson, Jr. | 2015-06-23 |
| 8744780 | Detector for clogged filters | David J. Wilson, Jr. | 2014-06-03 |
| D325252 | Portable air cleaner unit | David Morris, Gregory A. Morris | 1992-04-07 |
| D295216 | Combined air filter and cleaner unit | David Morris | 1988-04-12 |