| All Patents in class 137/613 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 30,485 | Oct. 23, 1860 | J.F. Letellier | Steam Valve | steam engine valves |
| 180,444 | Aug. 01, 1876 | L.S. Woodbury | Improvement in fire-hydrants | hydrants |
| 217,176 | Jul. 01, 1879 | D. Lang, A. Linn, A.J. Ulscht | Improvement in apparatus for regulating pressure in fermenting-casks | brewing apparatus |
| 383,225 | May 22, 1888 | A.G. Hohenstein | Pressure-regulator | steam valves |
| 402,749 | May 07, 1889 | S. Lawson | Gas Engine | gas and gasoline engines |
| 1,869,411 | Aug. 02, 1932 | J. De Mooy | Automatic Coupling Valve | pneumatic hoses and hose couplings |
| 2,277,006 | Mar. 17, 1942 | P.S. Russel | Control Device | flow controls |
| 2,384,169 | Sep. 04, 1945 | G.E. Huck, F.O. Luenberger | Controlling pressure in a fluid-filled motor | electric motors |
| 2,427,059 | Sep. 09, 1947 | W.S. Landon | Flow Control Means | flow controls |
| 2,912,011 | Nov. 10, 1959 | F.G. Burg | Valve structure | drill presses |
| 3,067,768 | Dec. 11, 1962 | J.L. Burg | Temperature compensated hydraulic control device | drill presses |
