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| All Patents in class 279/91 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,618,998 | Mar. 01, 1927 | J.M. Redinger | Milling Machine Collet and End Mill | milling machine tools | |
| 2,111,067 | Mar. 15, 1938 | T.L. Hedgpeth | Chuck for Woodworking Tools | wood shapers | |
| 2,682,182 | Jun. 29, 1954 | J.B. Armitage | Machine Tool | milling machines | |
| 2,719,722 | Oct. 04, 1955 | A.E. Nickless | Quick Change Tool Holder | milling machine tools | |
| 6,000,888 | Dec. 14, 1999 | R.L. Hartman | Quick Coupler Mechanism for Power Tool Bits | ||