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Patents Granted on 1931-07-28
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,815,980Jul. 28, 1931M.C. Dellinger, H.W. KulpValve Spring Liftervalve spring tools
1,816,548Jul. 28, 1931L. RobidouxSimplified Rule (Fractional markings to 64's)
1,816,598Jul. 28, 1931A.L. MartinMerchandise Display Boxwrench set holders
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