| All Patents in class 137/625.3 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 7,755 | Nov. 05, 1850 | J. Judson, A. Judson | Valve for governors | steam engine governors |
| 1,702,550 | Feb. 19, 1929 | F.E. Stevenson | Hydraulic Reducing Valve | hydraulic valves |
| 2,020,773 | Nov. 12, 1935 | H. Ernst | Deflection Variator | metalworking machine mechanisms |
| 2,042,782 | Jun. 02, 1936 | E.A. Hall | Dust Removing Means for Valve Seat Grinders or the Like | dust collectors |
| 2,042,783 | Jun. 02, 1936 | E.A. Hall | Adjusting Means for Sleeve Bearings | industrial machine bearings |
| 2,211,646 | Aug. 13, 1940 | L.A. Cole | Valve | |
| 2,314,827 | Mar. 23, 1943 | R.M. Hortvet | Process for extracting pure nitrogen from air | |
| 2,615,671 | Oct. 28, 1952 | M.E. Landon, Administratrix, W.S. Landon, deceased (Estate of) | Metering Valve | metering apparatus |
| 2,912,011 | Nov. 10, 1959 | F.G. Burg | Valve structure | drill presses |
