Suction disk plow
United States Patent 2320742

Inventors:
Newkirk, Clarence E.
Publication Date:
06/01/1943
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Assignee:
Newkirk, Clarence E.
Primary Class:
172/328
Other Classes:
172/572, 172/705, 172/596
International Classes:
A01B21/08; A01B21/00