| Patents Granted on 1881-12-13 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| CA-13,814 | Dec. 13, 1881 | W.D. Westman | Improvement on first and intermediate drivers | industrial machine pulleys and belt drive mechanisms |
| 250,641 | Dec. 13, 1881 | W.H. Brock | Chain Wrench | chain and strap wrenches |
| 250,670 | Dec. 13, 1881 | W. Lyon | Bit and drill stock | braces |
| 250,673 | Dec. 13, 1881 | A. Montant | Vise | bench vises |
| 250,712 | Dec. 13, 1881 | H.J. Colburn | Tilting-table saw | tablesaws |
| 250,726 | Dec. 13, 1881 | A. Guerdan | Cutterhead for stave-sawing machines | cutterheads |
| 250,762 | Dec. 13, 1881 | W.O. Smith | Lathe for turning irregular forms | pattern lathes |
| 250,884 | Dec. 13, 1881 | M.B. Campbell | Saw-mill log-carriage | sawmill carriages |
| 250,928 | Dec. 13, 1881 | C.E. Lewis | Pressure-roller for saw-mills | sawmill accessories |
| 250,955 | Dec. 13, 1881 | F. Ogden | Gear for Traction Engines | traction engine propulsion components |
| 250,992 | Dec. 13, 1881 | S.I. Snyder | Chuck for watch-makers | watchmaker |
