Granted Patent
Utility
US 6,609,820 · App. 10/022,227
Internal spring member agitating mechanism for agitating materials within sealed containers
Inventor:
Debora Margaret Hejza Litwiller
Patented Case
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Granted: Aug 26, 2003
Filed: Dec 20, 2001
Inventor
Debora Margaret Hejza Litwiller
Assignee (at issue)
Xerox Corporation
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.