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| US3954289 | 13 Jun 1974 | 4 May 1976 | East Houston Air Conditioning, Inc. | Plenum starter piece | | US4505499 | 2 May 1983 | 19 Mar 1985 | | Roof drain insert coupling | | US5378356 | 1 Oct 1993 | 3 Ene 1995 | LSP Specialty Products Company | Roof drain structure | | US7784242 | 5 May 2005 | 31 Ago 2010 | Zurn Industries, LLC | Drain support plate/under-deck clamp | | US7997038 | 15 Dic 2004 | 16 Ago 2011 | Zurn Industries, LLC | Floor drain support plate | | US8146308 | 14 Oct 2010 | 3 Abr 2012 | Zurn Industries, LLC | Floor drain support plate | | USD318101 | 24 Jul 1987 | 9 Jul 1991 | | Roof drain |
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