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| Patents for E. R. King | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,049,649 | Jan. 07, 1913 | R.B. Benjamin | Improvement in Screwdriver Handles | screwdriver handles | |
| 1,049,650 | Jan. 07, 1913 | R.B. Benjamin | Screwdriver | screwdriver handles | |
| 1,178,209 | Apr. 04, 1916 | R.B. Benjamin | Hand Tool | screwdriver handles | |