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All Patents in class 408/228 | |||||
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Picture | Number | Date | Patentee | Title | |
1,227,514 | May 22, 1917 | T.B. Williams, F.L. Smith | Rotary cutter | ||
![]() | 1,285,350 | Nov. 19, 1918 | C.A. Palmgren | Tool | |
4,720,219 | Jan. 19, 1988 | F.N. Rabo, S.J. Masonek | Reboring Tool |