Granted Patent
Utility
US 5,509,528 · App. 08/340,545
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Inventor:
James T. Weisburn
Patented Case
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Granted: Apr 23, 1996
Filed: Nov 16, 1994
Inventor
James T. Weisburn
Assignee (at issue)
Alpha Enterprises, 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.