Wheelless four-tools-in-one disk implement
United States Patent 2335156

Inventors:
Frederick, Mcmahon William
Publication Date:
11/23/1943
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Assignee:
Frederick, Mcmahon William
Primary Class:
172/253
Other Classes:
172/441, 172/492, 172/451, 172/574
International Classes:
A01B21/08; A01B21/00