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| Patents for John H. Vorstman | |||||
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| Number | Date | Patentee | Title | Type | |
| 407,334 | Jul. 23, 1889 | E.J. Muller, A. Cunningham | Saw-mill set-works | sawmill set works | |
| 462,286 | Nov. 03, 1891 | J.H. Vorstman, E.F. Niedecken | Saw-mill-carriage offset | sawmill carriages | |