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All Patents in class 172/745 | |||||
Number | Date | Patentee | Title | Type | |
421,661 | Feb. 18, 1890 | G.S. Briggs | Plowshare | plows | |
484,758 | Oct. 18, 1892 | G. Sears | Plow-point | plows | |
628,431 | Jul. 04, 1899 | W.A. Clark | Plow-point | plows |