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Patents for Harvey M. Allison
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberTitleClassification(s)
1,835,687Backing-Off Mechanism for Grinding Machines451/222, 451/374
1,835,733Backing Off Mechanism for Grinding Machines451/142, 451/374, 82/149
1,854,242Machine for Measuring Taps33/199R
1,854,244Machine for Measuring Two-Fluted Taps33/199R
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