Granted Patent
Utility
US 6,612,381 · App. 09/992,142
Seedbed preparation implement having rotary disc with adjustable gang angle
Inventors:
Jeffrey Powell, Edward G. Sheets
Patented Case
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Granted: Sep 2, 2003
Filed: Nov 6, 2001
Inventors
Jeffrey Powell
Edward G. Sheets
Assignee (at issue)
Case GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.