| Patents Granted on 1931-04-14 |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 1,800,264 | Apr. 14, 1931 | G.H. Rempes | Tool socket | |
| 1,800,267 | Apr. 14, 1931 | G.D. Sundstrand | Over-arm-clamping means | |
| 1,800,307 | Apr. 14, 1931 | W.A. Marschke, F.W. Marschke | Swing grinder | |
| 1,800,338 | Apr. 14, 1931 | C.A. Chapman | Fiberboard Plane | fiberboard planes |
| 1,800,341 | Apr. 14, 1931 | J.D. Davies | Rotary abrasive machine | handheld power sanders |
| 1,800,447 | Apr. 14, 1931 | O.P. Froeschl | Pliers | pliers |
| 1,800,450 | Apr. 14, 1931 | O.K. Hill | Cut-off sawing machine | circular crosscut saws |
| 1,800,572 | Apr. 14, 1931 | N.C. Simonsen | Mounting for oil gauges and the like | |
| 1,800,805 | Apr. 14, 1931 | B.D. Pinkney | Sanding machine | sanding machines |
| 1,800,888 | Apr. 14, 1931 | G.O. Johnson | Juvenile vehicle construction | |
| 1,800,889 | Apr. 14, 1931 | G.O. Johnson | Cycle frame and crank-hanger construction | |
| 1,800,982 | Apr. 14, 1931 | E.C. Bullard, F.H. Mussler | Hydraulic Change-Speed Gear Mechanism | |
| 1,801,035 | Apr. 14, 1931 | R.L. Carter | Shaping machine | cutters |
| 1,801,082 | Apr. 14, 1931 | F.G. Hobart | Pump | pumps |
| 1,801,086 | Apr. 14, 1931 | A.C. Boock, C.B. Jahnke | Power Plant | power plants |
