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| Patents for H. K. Porter | |||||
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| Number | Date | Patentee | Title | Type | |
| 94,504 | Sep. 07, 1869 | N.D. Beecroft, A.F. Noyes | Hand Weeder | ||
| 101,730 | Apr. 12, 1870 | E.F. Harrington | Improvement in cork-cutting machines | bung making machines | |