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| All Patents in class 157/1.49 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,468,055 | Sep. 18, 1923 | W.I. Tuttle | Valve-Grinding Apparatus | valve grinding tools | |
| 1,881,029 | Oct. 04, 1932 | E.M. Pfauser | Socket Wrench | socket wrenches | |