|
| US4041568 | 13 Sep 1976 | 16 Ago 1977 | | Vacuum cleaner |
| US4178654 | 26 Oct 1977 | 18 Dic 1979 | Alfred Mitchell | Floor polishing machines |
| US4355435 | 12 Sep 1980 | 26 Oct 1982 | Tennant Company | Surface maintenance equipment |
| US4598440 | 19 Jul 1984 | 8 Jul 1986 | Pioneer/Eclipse Corporation | High speed floor buffing machine and floor buffing method |
| US4701970 | 3 Abr 1986 | 27 Oct 1987 | Pioneer/Eclipse Corp. | High speed floor buffing machine and floor buffing pad |
| US4731956 | 21 Oct 1986 | 22 Mar 1988 | Advance Machine Company | Floor polishing machine |
| US4739534 | 30 Jul 1987 | 26 Abr 1988 | Pioneer/Eclipse Corp. | High speed floor buffing pad and holder |
| US4805258 | 22 Sep 1987 | 21 Feb 1989 | Tennant Trend Inc. | Battery powered walk behind floor burnisher |
| US5255408 | 11 Feb 1992 | 26 Oct 1993 | Eastman Kodak Company | Photographic film cleaner |
| US5974626 | 26 Mar 1997 | 2 Nov 1999 | Nilfisk-Advance, Inc. | Collection system for a floor polishing machine |
