|
| US3956573 | 22 May 1975 | 11 May 1976 | Textron, Inc. | Flush type floor box |
| US4289921 | 26 Dic 1979 | 15 Sep 1981 | H. H. Robertson Company | Electrical activating assembly and closure member therefor |
| US4297524 | 26 Dic 1979 | 27 Oct 1981 | H. H. Robertson Company | Electrical activating assembly and receptacle support means therefor |
| US4331832 | 10 Ene 1980 | 25 May 1982 | Sedco Pipe Products, Inc. | Electrical outlet box |
| US4737599 | 2 Oct 1986 | 12 Abr 1988 | | Electric outlet safety cover |
| US4927039 | 12 Jul 1989 | 22 May 1990 | Viscount Industries Limited | Electrical box |
| US5318453 | 30 Oct 1992 | 7 Jun 1994 | | Electric wall receptacle |
| US7078616 | 24 Sep 2004 | 18 Jul 2006 | The Lamson & Sessions Co. | Floor box |
| US7255325 | 21 Abr 2005 | 14 Ago 2007 | Technical Concepts, LLC | In-wall sensor assembly |
| US7465888 | 25 Oct 2006 | 16 Dic 2008 | Hilti Aktiengesellschaft | Cast-in element for forming a leadthrough for conduits |
| US7588344 | 22 Jul 2004 | 15 Sep 2009 | MFPF, Inc. | Stainless steel airport light cannister apparatus and method |
| US7621098 | 14 Nov 2002 | 24 Nov 2009 | MFPF, Inc. | Segmented foundation installation apparatus and method |
| US7988316 | 17 Dic 2004 | 2 Ago 2011 | MFPF, Inc. | Stainless steel airport light cannister apparatus and method |