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| All Patents in class 198/442 | |||||
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| Number | Date | Patentee | Title | Type | |
| 295,705 | Mar. 25, 1884 | G.R. Williams | Button Machine | button making machinery | |
| 4,066,163 | Jan. 03, 1978 | E.F. Rowekamp | Row Former for Articles | sorting apparatus | |