| All Patents in class 137/613 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 30,485 | Oct. 23, 1860 | J.F. Letellier | Steam Valve |
 | 180,444 | Aug. 01, 1876 | L.S. Woodbury | Improvement in fire-hydrants |
 | 217,176 | Jul. 01, 1879 | D. Lang, A. Linn, A.J. Ulscht | Improvement in apparatus for regulating pressure in fermenting-casks |
 | 383,225 | May 22, 1888 | A.G. Hohenstein | Pressure-regulator |
| | 402,749 | May 07, 1889 | S. Lawson | Gas Engine |
| | 1,869,411 | Aug. 02, 1932 | J. De Mooy | Automatic Coupling Valve |
| | 2,277,006 | Mar. 17, 1942 | P.S. Russel | Control Device |
 | 2,384,169 | Sep. 04, 1945 | G.E. Huck, F.O. Luenberger | Controlling pressure in a fluid-filled motor |
| | 2,427,059 | Sep. 09, 1947 | W.S. Landon | Flow Control Means |
 | 2,912,011 | Nov. 10, 1959 | F.G. Burg | Valve structure |
