Issued Patents All Time
Showing 26–32 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8514090 | Dust level sensor arrangement for dust collection system | Robert M. Witter, John J. Fitzsimmons | 2013-08-20 |
| 8491686 | Cyclonic dust collector with clamp-raised dust barrel | Robert M. Witter, John J. Fitzsimmons | 2013-07-23 |
| 8491685 | Cyclonic dust collector with variable speed drive and constant load current | Robert M. Witter | 2013-07-23 |
| 8161597 | Shop vacuum cleaner with cyclonic separator | Robert M. Witter | 2012-04-24 |
| D596358 | Shop vacuum cleaner with cyclonic separator | Robert M. Witter | 2009-07-14 |
| 7247180 | Silencer for dust collection system | — | 2007-07-24 |
| 5228116 | Knowledge base management system | Larry Harris, Dayton Marcott, Timothy F. Rochford | 1993-07-13 |