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| Patents for George L. Robinson | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,889,330 | Nov. 29, 1932 | G.L. Robinson, H.C. Humes | Screw Gripping Screwdriver | screwdriver blades | |
| 1,925,385 | Sep. 05, 1933 | G.L. Robinson, H.C. Humes | Screw Gripping Screwdriver | screwdriver blades | |