| Patents Granted on 1931-06-30 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| CA-312,892 | Jun. 30, 1931 | L.E. Blood | Feed mechanism for moulders, etc. | wood planers |
| 1,811,876 | Jun. 30, 1931 | E.P. Bullard, Jr. | Vertical Spindle Machine Tool | |
| 1,811,916 | Jun. 30, 1931 | A.G. Carter | Band saw wheel | bandsaws |
| 1,811,982 | Jun. 30, 1931 | J.A. Soustre | Knife adapted for multiple uses and comprising a monkey wrench | combination cork extractors |
| 1,812,366 | Jun. 30, 1931 | G.A. Perry | Taper Turner | metal lathe accessories and attachments |
| 1,812,369 | Jun. 30, 1931 | R.O. Beardsley, R.W. Porter | Projecting Mechanism and Gear Staging Device | gear measuring machines |
| 1,812,455 | Jun. 30, 1931 | B.F. Stowell | Diaphragm chuck | grinders |
| 1,812,479 | Jun. 30, 1931 | P.R. Hahnemann | Sheet metal working machine | sheet metal |
| 1,812,585 | Jun. 30, 1931 | J.G. Collins | Engine stand | |
| 1,812,685 | Jun. 30, 1931 | E. Cheshire | Composing room machine | printer |
| 1,812,748 | Jun. 30, 1931 | A. Kayser | Dynamo electric machine | electric motors |
| 1,812,755 | Jun. 30, 1931 | F.M. Quinsler | Power driven plane | handheld power planers |
| 1,812,820 | Jun. 30, 1931 | J.M. Burdick | T-shaped Lever for Levercaps | bench planes |
