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| All Patents in class 251/257 | |||||
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| Number | Date | Patentee | Title | Type | |
| 425,480 | Apr. 15, 1890 | A.W. Meston | Champagne-tap | champagne and soda tools | |
| 2,286,880 | Jun. 16, 1942 | W.A. Traut | Hydraulic Control System | ||
| 2,331,695 | Oct. 12, 1943 | G.H. Johnson | Transmission and Control Mechanism | metal lathes | |