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| Patents for E. Oscar Hamptner | |||||
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| Number | Date | Patentee | Title | Type | |
| 73,100 | Jan. 07, 1868 | G.W. Hubbard | Improvement in shaft-coupling | industrial machine shaft couplings | |
| 75,307 | Mar. 10, 1868 | S.A. Smith | Improvement in flour-bolts | ||
| 111,152 | Jan. 24, 1871 | S.A. Smith | Improvement in couplings for shafting | industrial machine shaft couplings | |