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| Patents Granted on 1959-12-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,917,813 | Dec. 22, 1959 | G. Crümmenerl, H. Ackermann | Detachable Tool Holder, Especially for Grooving Files | tool holders | |
| 2,917,952 | Dec. 22, 1959 | J.A. Lavallee | Reamer manufacture | reamers | |
| 2,917,958 | Dec. 22, 1959 | D.M. Simpson | Tool Holder | lathe tool holders and tool posts | |
| 2,917,977 | Dec. 22, 1959 | C.F. Erikson, F.R. Swanson | Machine tool | ||