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| All Patents in class 219/153 | |||||
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| Number | Date | Patentee | Title | Type | |
| 458,115 | Aug. 18, 1891 | E. Thomson | Method of Electric Bending and Straightening | metal bending machines | |
| 2,903,569 | Sep. 08, 1959 | G.H. Hochmuth, J.M. Davis | Method of Forming Spiral Blades | milling machine cutters | |
| 2,958,753 | Nov. 01, 1960 | G.H. Hochmuth, J.M. Davis | Die Set for Forming Cutter Blades | machinist tools | |