Granted Patent
Utility
US 4,948,651 · App. 07/372,870
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Inventors:
Autry O. V. DeBusk, Charles A. Lee
Patented Case
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Granted: Aug 14, 1990
Filed: Jun 27, 1989
Inventors
Autry O. V. DeBusk
Charles A. Lee
Assignee (at issue)
DeRoyal Industries, Inc.
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.