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| All Patents in class 241/281 | |||||
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| Number | Date | Patentee | Title | Type | |
| 475,881 | May 31, 1892 | W. Merrill | Machine for creating wood chips | excelsior machines | |
| 1,538,066 | May 19, 1925 | L.H. Street | Pulpwood Chipping Machine | wood grinding machines | |
| 2,053,505 | Sep. 08, 1936 | C.A. Waterous | Magazine grinder | wood grinding machines | |
| 3,815,763 | Jun. 11, 1974 | G.A. Bilocq, E.P. Hooper | Grinder feeding system | woodworking machine stockfeeding mechanisms | |