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| Patents Granted on 1822-04-16 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,496X | Apr. 16, 1822 | S. Lockwood, W. Loveland | Fire engine | fire engines | |
| 3,497X | Apr. 16, 1822 | W.W. Weaver | Making stove pipe | stove pipes | |