Granted Patent
Utility
US 6,181,387 · App. 09/270,611
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Inventor:
John B. Rosen
Patented Case
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Granted: Jan 30, 2001
Filed: Mar 17, 1999
Inventor
John B. Rosen
Assignee (at issue)
Rosen Products LLC
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.