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Depth control of tractor-carried agricultural implements
US 2,621,575 A
Filed
: 08/03/1945
Issued
: 12/16/1952
Est. Priority Date
: 11/07/1944
Status: Expired due to Term
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Current Assignee
Claes Berg
Original Assignee
Claes Berg
Inventors
CLAES BERG
Application Number
US02/608,662
Time in Patent Office
2,692 Days
Field of Search
US Class Current
172/4
CPC Class Codes
A01B 63/114
to achieve a constant worki...
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