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Patents Granted on 1939-10-31 | |||||
Number | Date | Patentee | Title | Type | |
2,177,820 | Oct. 31, 1939 | H.F. Brown | Boring Chuck | boring heads | |
2,177,852 | Oct. 31, 1939 | D.D. Wile | Refrigerating Apparatus | refrigeration apparatus | |
2,177,979 | Oct. 31, 1939 | E.E. Davis | Chuck | drill press chucks | |
2,178,135 | Oct. 31, 1939 | S.G. Brady | Trimming Mechanism for Grinding Wheels | grinder dressers | |
2,178,205 | Oct. 31, 1939 | G.O. Johnson | Punch press control | ||
2,178,441 | Oct. 31, 1939 | F.R. Swanson | Milling machine |