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| Patents Granted on 1844-05-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,597 | May 25, 1844 | S. Perry | Manner of Constructing an Inflammable Gas or Vapor Engine | gas and gasoline engines | |
| 3,600 | May 25, 1844 | J.P. Bartley | Shingle-cutter | shingle machines | |
| 3,602 | May 25, 1844 | E. Lyman | Tenoning and mortising machine | mortising machines | |