Granted Patent
Utility
US 4,389,757 · App. 06/265,137
Control lever seal
Inventors:
Karl-Heinz Luck, Albert Kallenberg, Manfred Schnippering, Herbert Moeselaken
Patented Case
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Granted: Jun 28, 1983
Filed: May 20, 1981
Inventors
Karl-Heinz Luck
Albert Kallenberg
Manfred Schnippering
Herbert Moeselaken
Assignee (at issue)
International Harvester Company
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.