| Patents for none listed |
Patents 1201 -
1215
of 3298
      |
| Number | Date | Patentee | Title | Type |
| 1,797,122 | Mar. 17, 1931 | F.J. Bohn | Micrometer Gauge for Internal Threads | thread gages |
| GB-345,092 | Mar. 19, 1931 | n. listed | Improvements in or Relating to Grinding or Abrading Machines | grinding machines |
| 1,797,730 | Mar. 24, 1931 | E.M. Pfauser | Socket Attachment for Tools | socket wrenches |
| 1,798,194 | Mar. 31, 1931 | J.H. Dodge | Reversible Ratchet Wrench | ratchet wrenches |
| 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 |
| 1,799,622 | Apr. 07, 1931 | W.S. Stuart | Nut and Pipe Wrench | pipe and nut combination wrenches |
| 1,800,447 | Apr. 14, 1931 | O.P. Froeschl | Pliers | pliers |
| 1,804,061 | May 05, 1931 | C.H. Roth | Camera | cameras |
| 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 |
| 1,805,295 | 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 |
