Granted Patent
Utility
US 6,553,616 · App. 10/001,704
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Inventor:
Timothy Scott Johnson
Patented Case
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Granted: Apr 29, 2003
Filed: Oct 25, 2001
Inventor
Timothy Scott Johnson
Assignee (at issue)
Duramax, 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.