Apparatus for cutting helical propellers
United States Patent 1333912

Inventors:
Hampson, Grant Charles
Publication Date:
03/16/1920
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Assignee:
Hampson, Grant Charles
Primary Class:
144/144.300
Other Classes:
144/359, 144/145.300, 144/134.100
International Classes:
B23Q3/06; B27M3/10