| Patents Granted on 1881-12-20 |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| CA-13,865 | Dec. 20, 1881 | H.A. Thompson | Thompson's Adjustable Wrench | screw adjust wrenches |
| 251,024 | Dec. 20, 1881 | A.J. Brill | Wheel for Transmitting Power | human powered apparatus |
| 251,091 | Dec. 20, 1881 | L.G. Bradford | Bedstead-fastening | beds and bedsteads |
| 251,141 | Dec. 20, 1881 | F.M. Simmons | Machine for grinding pulleys | grinders |
| 251,149 | Dec. 20, 1881 | H. Westphal | Saw | crosscut saws |
| 251,156 | Dec. 20, 1881 | S.J. Arnold | Machine for crozing & dressing barrels | barrel making machines |
| 251,182 | Dec. 20, 1881 | O.W. Bullock | Tweezers | watchmaker |
| 251,183 | Dec. 20, 1881 | O.W. Bullock | Combination watch-hand remover and case-opener | watchmaker |
| 251,200 | Dec. 20, 1881 | C.P. Fay | Calipers | calipers |
| 251,221 | Dec. 20, 1881 | W.P. Hale | Grain-binder | hay or straw binders |
| 251,224 | Dec. 20, 1881 | F. Hanson | Turning-lathe for varied work | wood lathes |
| 251,269 | Dec. 20, 1881 | G. Mee | Feeding appliance for saw-mills | sawmill feed works |
| 251,286 | Dec. 20, 1881 | H. Remillard | Machine for Recutting Axles | metal threading machines |
| 251,303 | Dec. 20, 1881 | P. Sisson | Saw-gummer | saw gummers |
| 251,305 | Dec. 20, 1881 | D. Slate | Lathe-Chuck | metal lathe accessories and attachments |
