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| Patents for John N. Wrigley | |||||
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| Number | Date | Patentee | Title | Type | |
| 69,526 | Oct. 01, 1867 | G. Smith, J.N. Wrigley | Improvement in cut-off valve-gear | steam engine valve gear | |
| 69,527 | Oct. 01, 1867 | G. Smith, J.N. Wrigley | Improvement in steam safety-valves | steam engine valves | |