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| All Patents in class 251/245 | |||||
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| Number | Date | Patentee | Title | Type | |
| 861,714 | Jul. 30, 1907 | H.C. Dudgeon | Hydraulic jack | hydraulic jacks | |
| 1,255,370 | Feb. 05, 1918 | A.W. Wheaton | Self Closing Faucet and Wrench or Handle Therefore | auxiliary wrenches | |
| 1,559,631 | Nov. 03, 1925 | A. Levedahl | Pneumatic tool | ||