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Patents Granted on 1966-05-31 | |||||
Number | Date | Patentee | Title | Type | |
3,253,463 | May 31, 1966 | K.R. Larson | Checking and Testing Devices for Coil Springs and the Like | ||
3,253,476 | May 31, 1966 | E. Olah | Variable speed drill | handheld power drills |