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| All Patents in class 19/55R | |||||
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| Number | Date | Patentee | Title | Type | |
| 255,943 | Apr. 04, 1882 | W.L. Crowson | Cotton Gin | cotton gins | |
| 347,656 | Aug. 17, 1886 | R.F. Smith | Gas Engine | gas and gasoline engines | |
| 1,767,894 | Jun. 24, 1930 | E.M. Hancock, W.J. Petty | Cotton Gin | cotton gins | |