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| All Patents of Type: collet closers | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,452,986 | Nov. 02, 1948 | R.F. Brennen | Collet and Collet Chuck Therefor | tool holding collets | |
| 3,361,433 | Jan. 02, 1968 | W.B. Holdridge | Collet Closer | collet closers | |
| 4,690,415 | Sep. 01, 1987 | W.B. Holdridge | Hydraulic Nosepiece Assembly for a Collet Closer, and Method | collet closers | |