| Patents for Theodore G. Ellis |
Patents 1 -
15
of 34
      |
| Number | Date | Patentee | Title | Type |
| 126,160 | Apr. 30, 1872 | D. Slate | Improvement in tool for grinding lathe-centers | tool making machines |
| 150,253 | Apr. 28, 1874 | E.G. Parkhurst | Profiling-Machines | profiling machines |
| 151,627 | Jun. 02, 1874 | A. Schmitter | Surface Gage | surface gauges |
| 156,640 | Nov. 10, 1874 | W.R. Landfear, N.E. Campbell | Improvement in lathes for turning spools | spool or bobbin machines |
| 164,391 | Jun. 15, 1875 | F.A. Pratt | Improvement in metal-shearing machines | |
| 164,392 | Jun. 15, 1875 | F.A. Pratt | Improvement in drop-hammers | |
| 167,165 | Aug. 31, 1875 | J.J. Grant | Improvement in die-stocks | tap wrenches and die stocks |
| 168,412 | Oct. 05, 1875 | F.A. Pratt | Improvement in cranes | cranes |
| 170,949 | Dec. 14, 1875 | J.J. Grant | Improvement in screw-cutting die holders | tap wrenches and die stocks |
| 172,854 | Feb. 01, 1876 | J.J. Grant | Improvement in Tap-Wrenches | tap wrenches and die stocks |
| 173,780 | Feb. 22, 1876 | J.J. Grant | Improvement in screw-cutting dies | taps and dies |
| 179,758 | Jul. 11, 1876 | J.B. Price, C.E. Billings | Improvement in die-stocks | tap wrenches and die stocks |
| 189,057 | Apr. 03, 1877 | J.R. Reynolds, F.A. Pratt | Improvement in machines for varnishing the interior of cartridge-shells | cartridges |
| 204,028 | May 21, 1878 | F.N. Gardner, N. Sawyer, J.J. Grant | Improvement in screw-cutting dies | taps and dies |
| 210,875 | Dec. 17, 1878 | E.S. Pierce | Three-jaw scroll chuck with conical volute | |
