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| US6223791 | 21 Oct 1999 | 1 May 2001 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
| US6354346 | 1 Mar 2001 | 12 Mar 2002 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
| US6367521 | 22 Feb 2001 | 9 Apr 2002 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
| US6450214 | 31 Aug 2001 | 17 Sep 2002 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
| US6488058 | 19 Jul 1999 | 3 Dec 2002 | 3M Innovative Properties Company | Gravity feed fluid dispensing valve |
