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Patents for Harry Samuel Nicholson | |||||
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Picture | Number | Date | Patentee | Title | |
1,080,507 | Dec. 02, 1913 | J.B. Armstrong | Trap-Valve Mechanism | ||
1,302,833 | May 06, 1919 | W.C. Beiswinger, H.S. Nicholson | Steam-Trap |