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| All Patents in class 144/252.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 177,268 | May 09, 1876 | D.C. Newell | Improvement in machines for separating waste from sawdust | waste collection mechanisms | |
| 227,316 | May 04, 1880 | H.D. Stover | Machine for cutting and conveying wood shavings | waste collection mechanisms | |