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| All Patents in class 261/92 | |||||
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| Number | Date | Patentee | Title | Type | |
| 407,961 | Jul. 30, 1889 | L.F. McNett | Combined Gas Engine and Carburetor | carburetors | |
| 1,302,716 | May 06, 1919 | C.E. Sargent | Dust Separator | air supply apparatus | |