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| Patents for M. T. Longden | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 533,855 | Feb. 12, 1895 | A.L. Adams | Auger-bit | |
 | 760,031 | May 17, 1904 | C.E. Smith | Try-Square | |
 | 841,758 | Jan. 22, 1907 | W.H. Adams | Drill-chuck | |
 | 1,010,755 | Dec. 05, 1911 | F.S. Harrington | Pick | |
 | 1,119,765 | Dec. 01, 1914 | F.C. Sanford | Die Stock | |
 | 1,193,525 | Aug. 08, 1916 | P. Dosch, C.R. Dosch | Disk-grinding machine | |
 | 1,214,521 | Feb. 06, 1917 | C.R. Dosch, P. Dosch | Clamping appliance | |
 | 1,226,173 | May 15, 1917 | C.F. Benjamin | Combined Carpenter's Square and Miter-Gage | |