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| Patents for J. A. Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| 652,573 | Jun. 26, 1900 | A.S. Williamson | Fuse Waterproof Detonator Crimper | pliers | |
| D43,104 | Oct. 08, 1912 | J.G. Cary | Design For a Combination Pocket-Tool | combination tools | |
| D43,268 | Nov. 26, 1912 | J.G. Cary | Design For A Combination Pocket Tool | combination tools | |