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| Patents for E. Oscar Haeuptner | |||||
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| Number | Date | Patentee | Title | Type | |
| 75,273 | Mar. 10, 1868 | S.A. Smith, G.W. Hubbard | Improvement in grinding-mills | ||
| 111,582 | Feb. 07, 1871 | S.A. Smith | Improvement in pulleys | industrial machine pulleys and belt drive mechanisms | |