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| All Patents in class 192/133 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,623,290 | Apr. 05, 1927 | F.W. Wappat | Portable saw | circular saws | |
| 2,308,728 | Jan. 19, 1943 | W. Trible, E.D. Vancil | Safety Control for Machine Tools | machine tool controls | |