Granted Patent
Utility
US 6,135,940 · App. 09/210,332
Centrifugally activated tube rotator mechanism and method for using the same
Inventor:
Michael R. Walters
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Dec 11, 1998
Inventor
Michael R. Walters
Assignee (at issue)
BECTON, DICKINSON AND COMPANY
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.