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| All Patents in class 279/4.09 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,372,592 | Mar. 27, 1945 | J.E. Lovely | Fluid Actuated Double Ended Chuck Spindle | ||
| 3,072,416 | Jan. 08, 1963 | L.A. Leifer | Force Amplifying Collet Chuck | ||
| 3,168,322 | Feb. 02, 1965 | H.R. Dziedzic | Chucking Device for Machine Tool Spindle and Tool Holder for E Therewith | ||
 | 4,690,415 | Sep. 01, 1987 | W.B. Holdridge | Hydraulic Nosepiece Assembly for a Collet Closer, and Method | |