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| Patents for Robert Cosmos Ellrich | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-50,148 | Oct. 03, 1895 | R.C. Ellrich | Meat Cutter | meat choppers | |
| 553,059 | Jan. 14, 1896 | R.C. Ellrich | Solid Bar Monkey Wrench | wrench handle components | |
| 584,111 | Jun. 08, 1897 | R.C. Ellrich | Wrench | screw adjust wrenches | |
| D28,512 | Apr. 26, 1898 | R.C. Ellrich | Wrench Frame | wrench handle components | |
| 855,292 | May 28, 1907 | R.C. Ellrich | Ratchet Mechanism | ratchet braces | |