| Patents Granted on 1891-06-30 |
Patents 1 -
15
of 29
      |
| Number | Date | Patentee | Title | Type |
| 454,848 | Jun. 30, 1891 | J.S. Cantelo | Drawing-knife | draw knives |
| 454,893 | Jun. 30, 1891 | J.E. Wakefield | Pipe-Wrench | quick adjust wrenches |
| 454,896 | Jun. 30, 1891 | C.A. Adams | Wrench | pipe wrenches |
| 454,917 | Jun. 30, 1891 | H. Phillips | Pipe Wrench | pipe tongs |
| 454,920 | Jun. 30, 1891 | E.W. Ross | Feed-cutter | |
| 454,929 | Jun. 30, 1891 | J.Q. Day | Screw-driver | spiral screwdrivers |
| 454,958 | Jun. 30, 1891 | E.A. Walker | Belt-Shifter for Planing-Machines | metal planers |
| 454,959 | Jun. 30, 1891 | E.A. Walker | Feed-Screw and Nut | metal planers |
| 454,960 | Jun. 30, 1891 | E.A. Walker | Frictional Feed-Clutch | metal planers |
| 455,001 | Jun. 30, 1891 | J.E. Lonergan | Testing-yoke for safety-valves | steam safety valves |
| 455,003 | Jun. 30, 1891 | J.W. Albert, C.R. Mead | Chuck | metal lathe chucks |
| 455,028 | Jun. 30, 1891 | G. Westinghouse, Jr. | Rotary Engine | rotary steam engines |
| 455,067 | Jun. 30, 1891 | N. Tesla | Electro-magnetic motor | multiphase motors |
| 455,068 | Jun. 30, 1891 | N. Tesla | Electrical meter | |
| 455,069 | Jun. 30, 1891 | N. Tesla | Electric incandescent lamp | |
