| Patents for Robert C. Ellrich |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 288,560 | Nov. 13, 1883 | R.C. Ellrich | Tool Handle | tool handles |
| 289,056 | Nov. 27, 1883 | R.C. Ellrich, G.S. Allen | Screwdriver | screwdriver handles |
| 293,957 | Feb. 19, 1884 | R.C. Ellrich | Pawl and ratchet | braces |
| 333,618 | Jan. 05, 1886 | R.C. Ellrich | Pipe Cutter | |
| 341,136 | May 04, 1886 | R.C. Ellrich | Ellrich patent saw set | |
| D20,448 | Jan. 06, 1891 | R.C. Ellrich | Design For A Monkey Wrench | wrench handle components |
| 475,055 | May 17, 1892 | R.C. Ellrich | Tool-chuck | brace chucks |
| 780,787 | Jan. 24, 1905 | R.C. Ellrich | Wrench | wrench handle components |
| 809,936 | Jan. 16, 1906 | R.C. Ellrich | Bit-brace jaw | brace chucks |
| 821,687 | May 29, 1906 | R.C. Ellrich, P.A. Whitney | Chuck | brace chucks |
| 821,688 | May 29, 1906 | R.C. Ellrich, P.A. Whitney | Chuck | brace chucks |
| 821,689 | May 29, 1906 | R.C. Ellrich, P.A. Whitney | Chuck | brace chucks |
| 880,870 | Mar. 03, 1908 | R.C. Ellrich | Ratchet Mechanism | ratchet braces |
