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| All Patents in class 279/127 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,446,063 | Feb. 20, 1923 | C.R. Pratt | Chuck | metal lathe chucks | |
| 2,538,289 | Jan. 16, 1951 | M.H. Arms | Diaphragm chuck | grinders | |
| 2,843,389 | Jul. 15, 1958 | L.B. Swanson, H.E. Sloan | Chuck | metal lathe chucks | |
| 3,814,449 | Jun. 04, 1974 | J.R. Buck | Hydraulic ring chuck | metal lathe chucks | |