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| US5013092 | 18 Jun 1990 | 7 May 1991 | | Surface stripping device |
| US6081959 | 1 Jul 1996 | 4 Jul 2000 | | Buffer centering system |
| US6105197 | 14 Abr 1998 | 22 Ago 2000 | | Centering system for buffing pad |
| US6145149 | 17 Dic 1998 | 14 Nov 2000 | Johnson Company, Ltd. | Automatic floor washing apparatus |
| US6223383 | 25 Feb 1999 | 1 May 2001 | | Cleaning and polishing pad for floors and the like |
| US6298518 | 14 Abr 1998 | 9 Oct 2001 | | Heat dissipating buffing pad |
| US6434774 | 1 Dic 2000 | 20 Ago 2002 | | Motorized brush |
| US6564418 | 28 Abr 2000 | 20 May 2003 | | Flag element for motor vehicle washing brushes and brush making method |
| USD631626 | 15 Abr 2009 | 25 Ene 2011 | | Rotary scrub pad |
