| All Patents in class 137/553 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 158,300 | Dec. 29, 1874 | M. Muchin | Governors for Steam Engines | steam engine governors |
| 1,161,861 | Nov. 30, 1915 | F.W. Hodges | Valve | industrial valves |
| 1,621,738 | Mar. 22, 1927 | J.W. Motherwell, H.S. Baker | Retard device | valves |
| 2,167,433 | Jul. 25, 1939 | G.B. Duffield | Air Vent Valve | valves |
| 2,313,438 | Mar. 09, 1943 | W.G. Hoelscher | Fluid Operated Gear Shifting Mechanism | metalworking speed changing mechanisms |
| 2,805,552 | Sep. 10, 1957 | C.F. Pabst, H.R. Hudson | Pre-Selector Dial Devices | metal lathe mechanisms |
| 3,505,972 | Apr. 14, 1970 | P.M. Benjamin | Deck Box for a Valve Operator | industrial valves |
