Referenziert von|
| US4585031 | 12. Juli 1985 | 29. Apr. 1986 | Red Valve Co., Inc. | Inversion-resistant tide gate valve | | US5727593 | 26. Juni 1996 | 17. März 1998 | Red Valve Company, Inc. | Tide gate valve with curvilinear bill | | US5931197 | 16. Apr. 1998 | 3. Aug. 1999 | Red Valve Co., Inc. | Asymmetrical check valve | | US6719004 | 25. Juli 2002 | 13. Apr. 2004 | | Check valve floor drain | | US6953059 | 25. Juli 2003 | 11. Okt. 2005 | Red Valve Company, Inc. | Check valve with hanger |
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