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All Patents in class 411/975 | |||||
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Number | Date | Patentee | Title | Type | |
221,299 | Nov. 04, 1879 | W. Gray | Nut-Lock | auxiliary wrenches | |
759,599 | May 10, 1904 | C.G. Ette | Washer | ||
888,982 | May 26, 1908 | C.G. Ette | Washer |