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| Patents for Joseph R. Doolittle | |||||
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| Number | Date | Patentee | Title | Type | |
| 339,277 | Apr. 06, 1886 | J.R. Doolittle | Screw driver | spiral screwdrivers | |
| D20,448 | Jan. 06, 1891 | R.C. Ellrich | Design For A Monkey Wrench | wrench handle components | |