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| All Patents in class 29/DIG.067 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,017,882 | Feb. 20, 1912 | A.B. Landis | Cutter-head | |
 | 1,017,883 | Feb. 20, 1912 | A.B. Landis | Cutter-head | |
 | 1,159,790 | Nov. 09, 1915 | H.W. Oster | Oiling mechanism for machine-tools | |
 | 1,758,973 | May 20, 1930 | C. Rasmussen | Pipe-threading machine | |
 | 2,470,350 | May 17, 1949 | J.A. Harrington | Water-cooled grinding wheel | |