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| All Patents in class 475/194 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,339,102 | Jan. 11, 1944 | F.A. Parsons | Transmission and Control Mechanism | milling machines | |
| 2,357,222 | Aug. 29, 1944 | F.A. Parsons | Transmission and Control Mechanism | milling machines | |