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| Patents for F. F. Campbell | |||||
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| Number | Date | Patentee | Title | Type | |
| 302,067 | Jul. 15, 1884 | A.D. Wallen | Screw holding screwdriver | screwdriver blades | |
| 309,620 | Dec. 23, 1884 | J. Hausman | Hammer Dies | hammers | |
| 351,393 | Oct. 26, 1886 | P. Murray, Jr. | Gas Engine | gas and gasoline engines | |