|
| US3983889 | 20 May 1975 | 5 Oct 1976 | Leichtmetall-Gesellschaft mbH | Process for cleaning the surface of continuously cast strip |
| US4348783 | 10 Nov 1980 | 14 Sep 1982 | Tennant Company | Scrubbing machine with selective recycle |
| US4586208 | 17 Dec 1984 | 6 May 1986 | Tennant Company | Floor maintenance machine and method |
| US5078161 | 31 May 1989 | 7 Jan 1992 | Flow International Corporation | Airport runway cleaning method |
| US5482211 | 21 Apr 1994 | 9 Jan 1996 | Hughes Aircraft Company | Supercritical fluid cleaning apparatus without pressure vessel |
| US5500976 | 8 Sep 1993 | 26 Mar 1996 | Cyclone Surface Cleaning, Inc. | Mobile cyclonic power wash system with water reclamation and rotary union |
| US5501396 | 22 Nov 1994 | 26 Mar 1996 | Cyclone Surface Cleaning, Inc. | Mobile cyclonic power wash system with water reclamation and rotary |
| US5601659 | 13 Mar 1995 | 11 Feb 1997 | Cyclone Surface Cleaning, Inc. | Mobile power wash system with water reclamation and hydrocarbon removal method |
| US5718015 | 10 Feb 1997 | 17 Feb 1998 | | Mobile power wash device with water reclamation and hydrocarbon removal apparatus |
| US6675548 | 11 Jan 2001 | 13 Jan 2004 | DYK Incorporated | Method and apparatus for texturizing tank walls |
| US6896742 | 31 May 2002 | 24 May 2005 | Tennant Company | Brushless scrub head for surface maintenance |
| US7857239 | 15 Feb 2008 | 28 Dec 2010 | | Self-propelled walking spray boom |
| US8061373 | 9 Oct 2008 | 22 Nov 2011 | | Surface cleaning apparatus |
