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| All Patents in class 251/292 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 275,042 | Apr. 03, 1883 | I.W. Heysinger | Suspension Wrench For Gas and Other Cocks | |
 | 386,263 | Jul. 17, 1888 | J.T. Pedersen | Tool Holder and Tools for the Same | |
 | 563,193 | Jun. 30, 1896 | W.J. Leach | Wrench For Applying and Removing Axle-Nuts | |
| 1,104,022 | Jul. 21, 1914 | M. Tuttle | Combined Wrench and Lock For Shut-Off Cocks | ||