| Patents Granted on 1931-05-12 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 1,804,459 | May 12, 1931 | R.R. Finn, E.T. Bysshe | Screw-Cutting Die | tapping heads and chucks |
| 1,804,468 | May 12, 1931 | J. Jensen | Angle Bar Bending Machine | metal bending machines |
| 1,804,523 | May 12, 1931 | H.L. Myers, H.H. Wolfe | Edging machine | sanding machines |
| 1,804,589 | May 12, 1931 | A.A. Breuer | Spraying unit | painter |
| 1,804,720 | May 12, 1931 | D. Turcott | Signaling device for an automatic lathe | pattern lathes |
| 1,804,971 | May 12, 1931 | E.P. Bullard, Jr. | Multiple Spindle Center Turning Machine | |
| 1,805,011 | May 12, 1931 | J. Salomone | Combination household implement | combination cork extractors |
| 1,805,043 | May 12, 1931 | J.O. Horton | Moving-arm radial arm saw | radial arm saws |
| 1,805,164 | May 12, 1931 | R.L. Carter | Shaft holder for applying chucks | handheld routers |
| 1,805,295 | May 12, 1931 | H.G. Rice | Bottle Capper | bottle cappers |
| 1,805,330 | May 12, 1931 | G.O. Leopold, T.J. Fegley | Extension bit | |
| 1,805,437 | May 12, 1931 | L.E. Blood, J.B. Wiard | Wood planing machine | wood planers |
