Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7967914 | Method and apparatus for cleaning fabrics, floor coverings, and bare floor surfaces utilizing a soil transfer medium | Frederick A. Hekman, Richard W. Wellens, Larry Wydra | 2011-06-28 |
| 6662402 | Apparatus for cleaning fabrics, floor coverings, and bare floor surfaces utilizing a soil transfer cleaning medium | Richard W. Wellens, Larry Wydra | 2003-12-16 |
| 6425958 | All surface cleaner | Richard A. Diekema | 2002-07-30 |
| 6115880 | Vacuum cleaner configuration | Richard F. Wulff | 2000-09-12 |
| 6085383 | Vacuum cleaner brush wrap geometry | Richard F. Wulff, Nilabh Narayan, Dick Mason | 2000-07-11 |