Granted Patent
Utility
US 4,637,239 · App. 06/692,023
Vehicular lock system with antilockout protection
Inventors:
Frank Kleefeldt, Peter Bartel
Patented Case
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Granted: Jan 20, 1987
Filed: Jan 16, 1985
Inventors
Frank Kleefeldt
Peter Bartel
Assignee (at issue)
Kiekert GmbH & Co. Kommanditgesellschaft
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.