Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6082376 | Method of operating a wet extractor | Richard Karr, David Erickson, William Hanold, Gregory W. Luebbering, William Phelan | 2000-07-04 |
| 5933912 | Wet extractor system | Richard Karr, David Erickson, William Hanold, Gregory W. Luebbering, William Phelan | 1999-08-10 |
| 5839159 | Wet extractor system | Richard Karr, David Erickson, William Hanold, Gregory W. Luebbering, William Phelan | 1998-11-24 |
| 5784755 | Wet extractor system | Richard Karr, David Erickson, William Hanold, Gregory W. Luebbering, William Phelan | 1998-07-28 |
| 4993108 | Vacuum cleaner with adjustable nozzle shield | Marco Sixtus Ferrari, Scott Bolbock | 1991-02-19 |