| All Patents in class 251/208 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 2,505,975 | May 02, 1950 | M.E. Landon, Administratrix, W.S. Landon, deceased (Estate of) | Reciprocating Travel Controlling Means | valves |
| 2,613,906 | Oct. 14, 1952 | H.C. Weimar | Hydraulic Control Valve | |
| 2,971,366 | Feb. 14, 1961 | E. Tomkow | Gage Calibration Device | measurement gauges |
