Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8650707 | Vacuum cleaner sound reducing device | Thomas W. Hawkins, Donald Joseph Davidshofer | 2014-02-18 |
| 8234750 | Vacuum cleaner accessory valve | Thomas W. Hawkins, Gregory W. Luebbering, Donald Joseph Davidshofer | 2012-08-07 |