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| All Patents in class 292/350 | |||||
| Number | Date | Patentee | Title | Type | |
| 831,745 | Sep. 25, 1906 | L.E. Rice | Locking device | ||
| 1,189,606 | Jul. 04, 1916 | W.L. Miller | Safety Crank for Shafts | metalworking machine mechanisms | |