Granted Patent
Utility
US 6,691,629 · App. 10/090,226
Planter coulter apparatus with hydraulic overload protection
Inventors:
Paul M. Paluch, Leonard A. Bettin
Patented Case
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Granted: Feb 17, 2004
Filed: Mar 4, 2002
Inventors
Paul M. Paluch
Leonard A. Bettin
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.