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| All Patents in class 192/55.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 622,160 | Mar. 28, 1899 | W.P. Norton | Friction Driving Device for Shaping or other Machines | metal shapers | |
| 1,387,017 | Aug. 09, 1921 | H.C. Smith | Resilient Clutch | metalworking machine clutches | |