| All Patents in class 137/468 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 85,792 | Jan. 12, 1869 | G.H. Clemens | Improvement in steam safety-valves | steam safety valves |
| 881,060 | Mar. 03, 1908 | J.J. Cook | Valve | valves |
| 2,012,550 | Aug. 27, 1935 | R. Powis | Viscosometer | flow gauges |
| 2,183,650 | Dec. 19, 1939 | G.L. Gundersen, E. Klafstad | Relief Valve | steam safety valves |
| 2,192,117 | Feb. 27, 1940 | D.D. Wile | Control Device | temperature controls |
| 2,259,280 | Oct. 14, 1941 | D.D. Wile | Control Device | refrigeration apparatus |
| 2,287,433 | Jun. 23, 1942 | E. Klafstad | System for Safeguarding the Operation of Steam Boilers | steam safety valves |
| 2,317,556 | Apr. 27, 1943 | P.S. Russel | Liquid Level Controlling Means | liquid level controls |
| 2,520,386 | Aug. 29, 1950 | E.J. Dillman | Refrigeration Expansion Valve | refrigeration apparatus |
| 2,592,913 | Apr. 15, 1952 | M.E. Landon, Administratrix, W.S. Landon, deceased (Estate of) | Liquid Level Control Means | liquid level controls |
| 2,915,076 | Dec. 01, 1959 | K.A. Teumer | Temperature compensating device | |
| 3,067,768 | Dec. 11, 1962 | J.L. Burg | Temperature compensated hydraulic control device | drill presses |
