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| All Patents in class 74/89.39 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,066,073 | Dec. 29, 1936 | A.E. Robinson | Safety Device for Elevating or Translating Mechanism | metalworking machine mechanisms | |
| 3,103,827 | Sep. 17, 1963 | N.R. Logan | Dual Operator for Slides | metalworking machines | |
| 3,187,601 | Jun. 08, 1965 | A.C. Glenn | Motion Transmitting Mechanism | metalworking machine mechanisms | |