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| All Patents in class 409/299 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,461,376 | Jul. 10, 1923 | F.A. Bartlett | Cutting bur | handheld power tool accessories | |
| 1,783,121 | Nov. 25, 1930 | J.H. Hoern | Piston Ring Burr Removing Device | surface grinders | |
| 1,854,522 | Apr. 19, 1932 | H.E. Morton | Flash Removing Machine | flash removing machines | |
| 2,009,670 | Jul. 30, 1935 | H.E. Morton | Flash Removing Machine | metal shapers | |
| 7,695,224 | Apr. 13, 2010 | P.J. Gleason | Deburring Welded Pipe | deburring apparatus | |