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Patents for John Mathys | |||||
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Number | Title | Classification(s) | |||
34,471 | Improvement in Tracto-Motive Engines | 180/10 | |||
35,480 | Improvement in the Manner of Working and Welding on the Steel in the Manufacture of Axes | 30/308.1, 76/103 | |||
37,865 | Improvement in Wrenches | 81/124.4, 81/125.1 |