Granted Patent
Utility
US 4,823,995 · App. 07/140,367
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Inventor:
Duane H. Lewis
Patented Case
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Granted: Apr 25, 1989
Filed: Jan 4, 1988
Inventor
Duane H. Lewis
Assignee (at issue)
Continental Plastic Corp.
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.