| Patents Granted on 1878-05-21 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| 203,822 | May 21, 1878 | D. Fisher | Pipe-Wrench | wrench jaw components |
| 203,840 | May 21, 1878 | J.C. Kinston | Improvement in machines for trimming last-blocks | shoemaking |
| 203,896 | May 21, 1878 | J.A. Dayton | Improvement in machines for veneering moldings | veneer machines |
| 203,908 | May 21, 1878 | H. Groves | Improvement in saw-mill carriages | sawmill carriages |
| 203,920 | May 21, 1878 | H. Kean | Mast & spar lathe | wood lathes |
| 203,934 | May 21, 1878 | J.B. Dougherty, P. Pitkin | Stone Polishing Machine | stone dressing machines |
| 203,946 | May 21, 1878 | C.D. Rodgers | Metal Screw Machine | screw machines |
| 203,949 | May 21, 1878 | G.B. Selden | Improvement in hoop-machines | hoop making machines |
| 204,003 | May 21, 1878 | W.E. Canedy, E.E. Leach | Improvement in fence-posts | |
| 204,018 | May 21, 1878 | H.F. Frisbie | Puppet-Valve | steam engine valves |
| 204,028 | May 21, 1878 | F.N. Gardner, N. Sawyer, J.J. Grant | Improvement in screw-cutting dies | taps and dies |
| 204,056 | May 21, 1878 | J.B. Leavitt | Improvement in planing-machines | wood planers |
| 204,067 | May 21, 1878 | J. Miller | Coffee Roaster | coffee roasters |
| 204,078 | May 21, 1878 | G. Pelstring | Improvement in wood-graining machines | specialty woodworking machines |
| 204,089 | May 21, 1878 | G.W. Remington | Adjustable Carriage-Wrench | axle nut wrenches |
