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Agricultural implement with threepoint hitch and guide link
US 3,057,414 A
Filed
: 12/30/1960
Issued
: 10/09/1962
Est. Priority Date
: 12/30/1960
Status: Expired due to Term
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Current Assignee
Harold A. Ralston
Original Assignee
Harold A. Ralston
Inventors
Ralston, Harold A.
Application Number
US04/079,718
Time in Patent Office
648 Days
Field of Search
US Class Current
172/444
CPC Class Codes
A01B 49/04
Combinations of soil-workin...
A01B 59/067
the lower arms being lifted...
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