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All Patents in class 60/522
Patents 1 - 4 of 4
Number	Date	Patentee	Title	Type
228,716	Jun. 08, 1880	E.F. Woodbury, G. Patten, J. Merrill, J.A. Woodbury	Air-Engine	hot air engines
228,717	Jun. 08, 1880	E.F. Woodbury, G. Patten, J. Merrill, J.A. Woodbury	Heaters for Air-Engines	hot air engines
324,060	Aug. 11, 1885	G. Patten, J. Merrill, J.A. Woodbury	Hot Air Engine	hot air engines
324,062	Aug. 11, 1885	J.A. Woodbury, E.F. Woodbury, G. Patten, J. Merrill	Air-Engine	hot air engines

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