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All Patents in class 110/175R | |||||
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Number | Date | Patentee | Title | Type | |
179,777 | Jul. 11, 1876 | J. Enright | Damper for Return Tube Boiler | stationary boilers | |
1,513,425 | Oct. 28, 1924 | D.W. Robb | Air-heating attachment for furnaces |