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Patents for Harvey M. Allison | |||||
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Number | Title | Classification(s) | |||
1,835,687 | Backing-Off Mechanism for Grinding Machines | 451/222, 451/374 | |||
1,835,733 | Backing Off Mechanism for Grinding Machines | 451/142, 451/374, 82/149 | |||
1,854,242 | Machine for Measuring Taps | 33/199R | |||
1,854,244 | Machine for Measuring Two-Fluted Taps | 33/199R |