| All Patents in class 91/51 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 1,959,177 | May 15, 1934 | B. Sassen | Hydraulic Steering Gear |
 | 2,270,059 | Jan. 13, 1942 | M. Kahr | Control mechanism for sawmill carriage steam feeds |
 | 2,363,111 | Nov. 21, 1944 | R.D. Bennett | Hydraulic valve |
| | 2,404,127 | Jul. 16, 1946 | H. Ernst | Sensitive Control Mechanism |
| | 2,573,368 | Oct. 30, 1951 | E.Y. Seborg | Reciprocatory drive for machine tools |
 | 2,599,899 | Jun. 10, 1952 | J.A. Denton | Servomotor |
| | 2,791,885 | May 14, 1957 | B. Sassen | Hydraulic Tracer Control |
| | 2,825,307 | Mar. 04, 1958 | N.V. Gusching, D.B. Enyeart | Hydraulic control system |
| | 2,969,808 | Jan. 31, 1961 | H. Horlacher | Two-Stage Valve |
| | 3,017,863 | Jan. 23, 1962 | N.V. Gusching, W.H. Ulman | Electrical control system |
