| Patents Granted on 1931-05-__ |
Patents 1 -
15
of 46
      |
| Number | Date | Patentee | Title | Type |
| 1,803,345 | May 05, 1931 | J. Oster | Hand clipper | hair clippers |
| 1,803,463 | May 05, 1931 | . | Saw | |
| 1,803,543 | May 05, 1931 | P. Brown | Magneto | ignition systems |
| 1,803,740 | May 05, 1931 | G. Vanderbeek | Boring machine | wood drilling and boring |
| 1,803,741 | May 05, 1931 | V.E. Martin, H.S. Walthers | Cutter head | cutterheads |
| 1,803,842 | May 05, 1931 | K.S. Davidson | Gauge Glass Mounting | gauges |
| 1,803,934 | May 05, 1931 | C.V. East | Saw Sharpener | saw sharpening machines |
| 1,803,973 | May 05, 1931 | L.T. Medholdt | Feed mechanism | woodworking machine stockfeeding mechanisms |
| 1,804,061 | May 05, 1931 | C.H. Roth | Camera | cameras |
| 1,804,133 | May 05, 1931 | W. Townsend | Unloading valve | pressure regulators |
| 1,804,142 | May 05, 1931 | S. Billington | Try and Miter Square | miter squares |
| 1,804,149 | May 05, 1931 | F.J. Clemens | Belt Plier | pliers |
| 1,804,197 | May 05, 1931 | L.F. Nenninger, W.D. Archea, G.W. Binns | Centerless Grinding | grinding machines |
| 1,804,234 | May 05, 1931 | J.C. Sharp | Wood Oil Feeded and Method of Producing the Same | industrial machine bearings |
| 1,804,365 | May 05, 1931 | C.S. Price | Gluing machine | gluing machines |
