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| All Patents in class 251/99 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,255,370 | Feb. 05, 1918 | A.W. Wheaton | Self Closing Faucet and Wrench or Handle Therefore | auxiliary wrenches | |
| 3,148,704 | Sep. 15, 1964 | A. Blass | Combination or branch valve | ||