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| All Patents in class 60/911 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,335,305 | Nov. 30, 1943 | F.A. Parsons | Machine Tool Transmission and Control Mechanism | milling machines | |
| 2,473,572 | Jun. 21, 1949 | E.A. Ruchty, N.D. Cooper | Magnetic Servo Operator | metalworking machine mechanisms | |
| 2,500,150 | Mar. 14, 1950 | E.P. Bullard, L.J. Baudis, C.M. Grinage | Positining Apparatus | ||