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All Patents in class 251/54 | |||||
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Picture | Number | Date | Patentee | Title | |
2,577,455 | Dec. 04, 1951 | E.J. Dillman | Pressure Regulator | ||
2,577,680 | Dec. 04, 1951 | K.A. Harmon, G.A. Guernsey | Control mechanism for the brake holders of automotive vehicles |