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| All Patents in class 57/71 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,046X | Aug. 20, 1835 | A. Caldwell | Spinning hemp and flax | flax and hemp machines | |
| 2,342,343 | Feb. 22, 1944 | C.F. Hotchkiss, Jr. | Apparatus for Making Flexible Shafting | flexible shafts | |