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| Patents for Joseph H. Blackwood | |||||
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| Number | Date | Patentee | Title | Type | |
| 397,202 | Feb. 05, 1889 | C.H. Nunn | Oil Cup | oil cups | |
| 588,916 | Aug. 24, 1897 | E.F. Frost, W.G. Steward | Kinetoscope | audio-visual apparatus | |