Granted Patent
Utility
US 5,233,290 · App. 07/787,936
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Inventor:
Mark A. Swart
Patented Case
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Granted: Aug 3, 1993
Filed: Nov 5, 1991
Inventor
Mark A. Swart
Assignee (at issue)
Everett Charles Technologies, 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.