Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7752708 | Floor cleaning apparatus with filter cleaning system | Donald Eugene Proffitt, Alan T. Pullins, James Todd Crouch, Michael L. Fry, Eric J. Streciwilk +2 more | 2010-07-13 |
| 7673369 | Floor cleaning apparatus with filter cleaning system | Yasushi Kondo, Donald Eugene Proffitt | 2010-03-09 |
| 7386917 | Vacuum cleaner with quick release wand | Donald Eugene Proffitt | 2008-06-17 |
| 7181804 | Removable dirt cup assembly with external filter | Danielle Hafling, Joel Erik Hitzelberger, Mark J. Medley, Alan T. Pullins | 2007-02-27 |