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| Patents for Leo McKenna | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,043,436 | Nov. 05, 1912 | P.J. Joecken | Planer feed attachment | ||
| 1,098,629 | Jun. 02, 1914 | P.J. Joecken | Feed device for planers and the like | ||
| 1,171,957 | Feb. 15, 1916 | P.J. Joecken | Feeder for planers | ||