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| All Patents in class 122/151 | |||||
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| Number | Date | Patentee | Title | Type | |
| 165,810 | Jul. 20, 1875 | J. Enright | Boiler for Portable Engines | portable steam engines | |
| 3,259,108 | Jul. 05, 1966 | P.B. Seasholtz, S.N. Craig | Boilers | stationary boilers | |