| Patents Granted on 1931-03-31 |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| CA-309,995 | Mar. 31, 1931 | G.A. Ungar, U.F. Steindorff, H.J. Heller | Cutting shears | metal shearing machines |
| 1,798,158 | Mar. 31, 1931 | W.H. Hazard | Stuffing Box | pump stuffing boxes and seals |
| 1,798,194 | Mar. 31, 1931 | J.H. Dodge | Reversible Ratchet Wrench | ratchet wrenches |
| 1,798,206 | Mar. 31, 1931 | W.D. Johnson | Chip breaker | wood planers |
| 1,798,234 | Mar. 31, 1931 | H.M. Toppin | Key holder for tools | handheld power tool accessories |
| 1,798,309 | Mar. 31, 1931 | W.W. Criley | Four Roll Hammer | power hammers |
| 1,798,310 | Mar. 31, 1931 | W.W. cri | Board Hammer | power hammers |
| 1,798,422 | Mar. 31, 1931 | J.T. Janette | Valve for gas furnace | furnaces |
| 1,798,457 | Mar. 31, 1931 | J.D. Cole | Deodorizing unit | |
| 1,798,481 | Mar. 31, 1931 | N.F. McNaught, E.H. Peterson | Ratchet lever | ratchet wrenches |
| 1,798,482 | Mar. 31, 1931 | N.F. McNaught, E.H. Peterson | Ratchet lever | |
| 1,798,496 | Mar. 31, 1931 | J. Reid | Lubricating Eccentric Driving Gears | internal combustion engine lubrication |
| 1,798,512 | Mar. 31, 1931 | O.W. Young | Wood shaping and finishing machine | wood shapers |
| 1,798,570 | Mar. 31, 1931 | G.C. Wahl | Feeder for woodworking machines | woodworking machine stockfeeding mechanisms |
| 1,799,120 | Mar. 31, 1931 | C. Philbrick | Knife-clamping device for cutter heads | cutterheads |
