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| Patents for H. W. Ladd | |||||
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| Number | Date | Patentee | Title | Type | |
| 799,840 | Sep. 19, 1905 | F.A. Edwards | Wrench | ratchet wrenches | |
| 815,758 | Mar. 20, 1906 | L.S. Starrett | Screw Holding Screwdriver | screwdrivers | |