| All Patents in class 251/14 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
 | FX-6,157 | Oct. 01, 1830 | A.B. Quimby | Preventing explosion of steamboat boilers |
| | 873,822 | Dec. 17, 1907 | F.L. Wolfe | Whistle Valve |
| | 2,101,712 | Dec. 07, 1937 | E.K. Johansen | Tracer Mechanism for Duplicating Machines |
| | 2,269,395 | Jan. 06, 1942 | G.R. True, E.J. Dillman | Refrigeration Control Apparatus |
| | 2,297,872 | Oct. 06, 1942 | E.J. Dillman, W.E. Cowley, F.Y. Carter | Control Apparatus |
| | 2,403,427 | Jul. 02, 1946 | O.H. Ludeman | Valve Mechanism |
| | 2,496,040 | Jan. 31, 1950 | W.W. Criley | Control Valve Mechanism for Clutches and Brakes |
| | 2,566,173 | Aug. 28, 1951 | E.J. Dillman | Pilot Operated Valve |
| | 2,728,564 | Dec. 27, 1955 | R.F. Bracke | Carburetor |
