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Patents for H. D. Williams | |||||
Number | Date | Patentee | Title | Type | |
272,940 | Feb. 27, 1883 | B.F. Bergh | Gear-wheel | industrial machine gearing | |
298,635 | May 13, 1884 | F. Thompson | Damper-regulator | ||
331,246 | Nov. 24, 1885 | J.W. Kenyon | Steam-trap |