|
| US4196492 | 14 dec 1978 | 8 apr 1980 | H. B. Fuller Company | Automatic carpet cleaning machine |
| US4210978 | 20 dec 1977 | 8 jul 1980 | H. B. Fuller Company | Automatic carpet cleaning machine |
| US4800612 | 23 nov 1987 | 31 jan 1989 | Cross American Corporation | Vacuum power booster with automatic waste liquid discharge for a water vacuum extraction apparatus |
| US4817233 | 22 apr 1988 | 4 apr 1989 | Tennant Company | Scrubber squeegees for scrubbing forward and backward |
| US4951346 | 7 dec 1987 | 28 aug 1990 | Carl Salmon | Cleaning attachment |
| US4956891 | 21 feb 1990 | 18 sep 1990 | Castex Industries, Inc. | Floor cleaner |
| US4974618 | 9 sep 1985 | 4 dec 1990 | Duraclean International, Inc. | Apparatus and method for fabric cleaning with foam |
| US5088149 | 6 aug 1990 | 18 feb 1992 | Tennant Company | Vacuum powered scrub head |
| US5319828 | 4 nov 1992 | 14 jun 1994 | Tennant Company | Low profile scrubber |
| US5867861 | 12 nov 1996 | 9 feb 1999 | | Upright water extraction cleaning machine with two suction nozzles |
| US5933911 | 3 mar 1997 | 10 aug 1999 | Diversey Lever, Inc. | Apparatus for cleaning a ground |
| US6279196 | 2 jan 2001 | 28 aug 2001 | Bissell Homecare, Inc. | Upright water extraction cleaning machine |
| US6438793 | 10 jul 2000 | 27 aug 2002 | Bissell Homecare, Inc. | Upright extraction cleaning machine |
| USRE33926 | 3 apr 1991 | 19 maj 1992 | Tennant Company | Scrubber squeegees for scrubbing forward and backward |
| USRE35033 | 30 dec 1993 | 12 sep 1995 | Tennant Company | Scrubber squeegees for scrubbing forward and backward |
