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| Patents for S. F. Williamson | |||||
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| Number | Date | Patentee | Title | Type | |
| 649,011 | May 08, 1900 | J. Szafka | Surface Gage | surface gauges | |
| 1,171,939 | Feb. 15, 1916 | M.I. Ginsburg | Wrench | quick adjust wrenches | |