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| US4145778 | 4 Ago 1977 | 27 Mar 1979 | | Double fitted sheet and method of making |
| US4237805 | 28 Dic 1978 | 9 Dic 1980 | | Method for making a double fitted sheet |
| US4338693 | 18 Ene 1980 | 13 Jul 1982 | Perfect Fit Industries, Inc. | One-piece quilted mattress shield |
| US4727608 | 28 Jul 1986 | 1 Mar 1988 | | Fitted bed sheet and method of making same |
| US4777894 | 9 Dic 1987 | 18 Oct 1988 | | Fitted bed sheet and method of making same |
| US4802250 | 5 Jun 1987 | 7 Feb 1989 | | Self-alignment bedding |
| US4970744 | 1 May 1990 | 20 Nov 1990 | | Fitted sheet |
| US5628077 | 13 Ago 1996 | 13 May 1997 | | Draw string fitted sheet with curved hem for even tension |
| US7299513 | 24 Ago 2006 | 27 Nov 2007 | F.O. Berg Company | Bladder support system |
