Title:
Variable pitch propeller
United States Patent 2052454

Inventors:
Leonard, Ellwood Isaac
Blake, Burton
Publication Date:
08/25/1936
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Assignee:
Leonard, Ellwood Isaac
Blake, Burton
Primary Class:
416/89
Other Classes:
416/136
International Classes:
B64C11/34; F03D7/02; B64C11/00; F03D7/00