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| Patents Granted on 1938-05-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| D109,879 | May 31, 1938 | W. Ruby | Design For A Combination Pencil, Corkscrew, And Bottle Opener | combination cork extractors | |
| CA-374,130 | May 31, 1938 | K.A. Harmon | Electric generator | ignition systems | |
| 2,118,912 | May 31, 1938 | J.B. Armitage | Cutter Grinder | tool grinders | |
| 2,118,967 | May 31, 1938 | F.W. Curtis | Cutter grinder | tool grinders | |
| 2,119,029 | May 31, 1938 | W.I. Senger | Machine Tool Holder | lathe tool holders and tool posts | |
| 2,119,128 | May 31, 1938 | I.J. Clark | Valve Spring Compressor | valve spring tools | |
| 2,119,217 | May 31, 1938 | P. Rocchi | Tool Holder | tool holders | |
| 2,119,298 | May 31, 1938 | A.W. Simowski | Gear Finishing Tool | gear cutting tools | |