Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8393052 | Dual motor upright vacuum cleaner | Douglas L. Blocker | 2013-03-12 |
| 8020252 | Dual motor upright vacuum cleaner | Douglas L. Blocker | 2011-09-20 |
| 7805807 | Dual motor upright vacuum cleaner | Douglas L. Blocker | 2010-10-05 |
| 7627927 | Vacuum cleaner with sensing system | Douglas L. Blocker, T. Joy H. Petty | 2009-12-08 |
| 7386915 | Dual motor upright vacuum cleaner | Douglas L. Blocker | 2008-06-17 |
| 7310855 | Vacuum cleaner counter-balance mechanism | Douglas L. Blocker, Keith Ryan Green | 2007-12-25 |
| D527505 | Vacuum cleaner | Douglas P. Marren | 2006-08-29 |
| D515754 | Vacuum cleaner | Douglas P. Marren | 2006-02-21 |
| 6290422 | Vacuum cleaner hook assembly | David T. Hamm | 2001-09-18 |
| D443121 | Vacuum cleaner handle | David T. Hamm | 2001-05-29 |
| D432282 | Vacuum cleaner | David T. Hamm | 2000-10-17 |
| D431332 | Vacuum cleaner | David T. Hamm | 2000-09-26 |
| 6106182 | Vacuum cleaner hook assembly | David T. Hamm | 2000-08-22 |