| Patents Granted on 1881-05-31 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| RE9,726 | May 31, 1881 | T.H. Fletcher | Pegging-machine | cobbler |
| RE9,730 | May 31, 1881 | B. Holly | Street-Main | steam heating |
| RE9,734 | May 31, 1881 | W.L. Sweetland | Lathe-chuck | metal lathe chucks |
| 242,101 | May 31, 1881 | J. Barnes, W. Barnes | Book Stitching Machine | |
| 242,130 | May 31, 1881 | S.E. Hurlbut | Wrench | alligator wrenches |
| 242,144 | May 31, 1881 | E.G. McClure | Sucker Rod Wrench | wrenches |
| 242,160 | May 31, 1881 | C. Scholz | Wrench | quick adjust wrenches |
| 242,242 | May 31, 1881 | C.W. Wilder | Wood-turning lathe | wood lathes |
| 242,249 | May 31, 1881 | L. Barthelmes | Wood-bending machine | wood bending machines |
| 242,280 | May 31, 1881 | J. De Beauvais | Machine for cutting card-board | paper cutting machines |
| 242,308 | May 31, 1881 | T. Hanvey | Apparatus for grinding wood pulp | manufacturing paper |
| 242,357 | May 31, 1881 | P. Nolan | Railroad Track Gage | track gauges |
| 242,362 | May 31, 1881 | W.L. Parmelee | Auger | auger bits |
| 242,401 | May 31, 1881 | G. Wacker | Gas Engine | gas and gasoline engines |
