03/14/1923 Hardy, William Abbott to Canada. Commissioner of Patents
(Edison, Thomas Alva, Jr) Patents; Engines, boilers, prime movers [Document Within a Document]
[PT5106]  Patent Series -- Patent Application Folios: Air Auxiliary Supply Means for Internal-Combustion Engines (T. A. Edison, Jr.) (1919)
[PT5106B; TAEM 247:281]
Courtesy of Thomas Edison National Historical Park.
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