Reversible plowshare structure
United States Patent 2674173
US Patent References:
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Inventors:
Wheeler, William I.
Publication Date:
04/06/1954
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Assignee:
Wheeler, William I.
Primary Class:
172/704
International Classes:
A01B15/04; A01B15/00
US Patent References:
1230963
1680830Method for making plowshares
1762251Plowshare