| Patents Granted on 1855-02-20 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 12,410 | Feb. 20, 1855 | S.H. Noble | Screw-Wrench | quick adjust wrenches |
| 12,412 | Feb. 20, 1855 | G.P. Ketcham | Method of driving pairs of reciprocating saws | reciprocating sawmills |
| 12,416 | Feb. 20, 1855 | J. Hastings, J. Ramsay, H.G. Chamberlain | Machine for cutting tenons | windowblind machines |
| 12,423 | Feb. 20, 1855 | W. Stephens | Slide Rest for Lathes | metal lathes |
| 12,424 | Feb. 20, 1855 | S.R. Smith, E. Cowles | Excelsior machine | excelsior machines |
| 12,429 | Feb. 20, 1855 | J. Peirson | Machine for manufacturing hoops | hoop making machines |
