| Patents Granted on 1873-05-20 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| RE5,417 | May 20, 1873 | G.C. Taft | Improvement in Letter Copying Presses | |
| 138,979 | May 20, 1873 | A.D. Cole, J. Abell | Water-Wheels | turbine water wheels |
| 139,006 | May 20, 1873 | S.W. Hemenway | Improvement in Auger Handles | |
| 139,028 | May 20, 1873 | O.S. Smiley, C.O. Small | Spindle lathe | wood lathes |
| 139,043 | May 20, 1873 | J. Church | Improvement in machines for entering blind-slats | mortising machines |
| 139,054 | May 20, 1873 | D.T. Gale | Nut and Coffee Roasters | seed or nut roasters |
| 139,069 | May 20, 1873 | C. Law | Improvement in Screw Drivers | screwdriver blades |
| 139,076 | May 20, 1873 | A.R. Park | Saddle-tree lathe | wood lathes |
| 139,091 | May 20, 1873 | J. Swan | Improvement in Machines for Forming the Lips of Augers | |
| 139,096 | May 20, 1873 | E. Ware | Steam Engine Governor-Valves | steam engine governors |
| 139,121 | May 20, 1873 | J.W. Davis | Improvement in fastening pocket-openings | |
| 139,124 | May 20, 1873 | W.H. Dobson | Improvement in saw-setting machines | saw sharpening machines |
| 139,142 | May 20, 1873 | W.M. Ferry, O.H. Gronberg | Improvement in edging-machines | circular ripsaws |
| 139,148 | May 20, 1873 | J. Harvey | Improvement in machines for bending pipe-stems | wood bending machines |
| 139,149 | May 20, 1873 | C.F. Henis | Improvement in Saw Filing Machines | saw sharpening tools |
