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| All Patents in class 251/111 | |||||
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| Number | Date | Patentee | Title | Type | |
| 615,243 | Dec. 06, 1898 | A.E. Bocquet | Gas Cock or Valve | auxiliary wrenches | |
| 2,565,522 | Aug. 28, 1951 | W.S. Renier | Molding Machine | plastic molding machines | |