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| All Patents in class 144/338 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,348,592 | Oct. 24, 1967 | R.W. Wagner, R.A. Winblad | Timber Harvesting Machine | tree felling machines | |
| 3,516,462 | Jun. 23, 1970 | E.O. Martinson, P.A. Huffaker | Apparatus for harvesting trees | tree felling machines | |