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| All Patents in class 144/336 | |||||
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| Number | Date | Patentee | Title | Type | |
| 127,270 | May 28, 1872 | G. Robinson | Improvement in electrical wood-dividers | sawblades | |
| 1,642,668 | Sep. 20, 1927 | C.J. Brey | Apparatus for felling trees and the like | tree felling machines | |