| Patents Granted on 1939-03-21 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| D113,860 | Mar. 21, 1939 | R.E. Wolfe, R.F. Kneisley | Design for a surfacing machine | sanding machines |
| 2,150,959 | Mar. 21, 1939 | R.H. Bergström | Tool Holder | lathe tool holders and tool posts |
| 2,151,189 | Mar. 21, 1939 | L. Coddington | Variable speed transmission mechanism | metal cutting bandsaws |
| 2,151,255 | Mar. 21, 1939 | E.J. Witchger | Spring Nut | |
| 2,151,291 | Mar. 21, 1939 | L.B. Ades | Machine tool | |
| 2,151,379 | Mar. 21, 1939 | J.E. Flaker | Tool Holder | lathe tool holders and tool posts |
| 2,151,611 | Mar. 21, 1939 | . | Gauge | |
| 2,151,647 | Mar. 21, 1939 | B. Wheeler | Valve Actuating Mechanism | steam engine valve gear |
| 2,151,656 | Mar. 21, 1939 | B.E. Folke | Choke Fitting for Steam Heat Pipes | feedwater apparatus |
| 2,151,657 | Mar. 21, 1939 | B.E. Folke | Valve | feedwater apparatus |
| 2,151,658 | Mar. 21, 1939 | B.E. Folke | Injector | water injectors |
