| Patents Granted on 1931-04-21 |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 1,801,326 | Apr. 21, 1931 | O. Boisvert | Guard for planing machines | jointers |
| 1,801,425 | Apr. 21, 1931 | W.B. Grueter | Sawmill setworks | sawmill set works |
| 1,801,443 | Apr. 21, 1931 | F. Mesinger | Tool Holder | automobile accessories |
| 1,801,545 | Apr. 21, 1931 | G.A. Dunn | Jogging mechanism for tying machines | box making machines |
| 1,801,686 | Apr. 21, 1931 | E.J. Kearney, J.B. Armitage, F.A. Parsons | Machine-Tool Organization | milling machines |
| 1,801,982 | Apr. 21, 1931 | D.B. Salstrom | Form tool for carving machines | carving machines |
| 1,802,051 | Apr. 21, 1931 | R.J. Gits | Reservoir Grease Cup | grease cups |
| 1,802,096 | Apr. 21, 1931 | H.E. Tautz | Planer attachment for jointers | jointers |
| 1,802,140 | Apr. 21, 1931 | J.G. De Remer | Portable massage machine | exercise and sports equipment |
