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Patents Granted on 1930-07-22
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,770,899Jul. 22, 1930J.A. AndersonValve Spring Liftervalve spring tools
1,770,935Jul. 22, 1930E. LochmanEraser-cleaning machine
1,771,172Jul. 22, 1930B. FraserWrenchself-adjust wrenches
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