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| All Patents in class 322/40 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,731,569 | Jan. 17, 1956 | J.S. Cardillo, M.M. Hann, F.G. Lundgard, S.J. L | Hydraulic transmission and control | ||
| 2,885,566 | May 05, 1959 | R.H. Eisengrein, G.G. Hermanson, C.L. Sadler | Control means | ||