| Patents for none listed |
Patents 1231 -
1245
of 3327
      |
| Number | Date | Patentee | Title | Type |
| 1,804,149 | May 05, 1931 | F.J. Clemens | Belt Plier | pliers |
| 1,804,383 | May 05, 1931 | C.B. Litterio | Cylinder Gauge | measurement gauges |
| 1,804,971 | May 12, 1931 | E.P. Bullard, Jr. | Multiple Spindle Center Turning Machine | multiple spindle machines |
| 1,805,295 | May 12, 1931 | H.G. Rice | Bottle Capper | bottle cappers |
| 1,807,134 | May 26, 1931 | E.M. Pfauser | Socket Wrench | ratchet wrenches |
| GB-349,197 | May 28, 1931 | n. listed | Improvements in or Relating to Grinding or Abrading Machines | grinding machines |
| 1,807,625 | Jun. 02, 1931 | H.J. Hjorth | Valve Wrench | wrenches |
| 1,808,190 | Jun. 02, 1931 | F.J. Vlchek | Wrench Set Unit | wrench set holders |
| 1,808,462 | Jun. 02, 1931 | M. Horeth | Hub Cap Wrench | automotive specialty wrenches |
| 1,808,856 | Jun. 09, 1931 | F.W. Miller | Valve Grinder | valve grinding tools |
| 1,809,450 | Jun. 09, 1931 | A.I. Platt | Wrench Kit Holder | wrench set holders |
| 1,809,805 | Jun. 09, 1931 | F.J. Vlchek | Drop Hammer | drop hammers |
| GB-350,921 | Jun. 15, 1931 | n. listed | Improvements in or Relating to Machines for Grinding Rolls and the Like | grinding machines |
| 1,810,108 | Jun. 16, 1931 | W.C. Kress | | wrench set holders |
| 1,811,137 | Jun. 23, 1931 | W.C. Kress | Socket Wrench | socket wrenches |
