Granted Patent
Utility
US 5,256,137 · App. 07/848,217
Biphasic power source for use in an iontophoretic drug delivery system
Inventor:
Burton H. Sage, Jr.
Patented Case
View Patent ↗
Granted: Oct 26, 1993
Filed: Mar 10, 1992
Inventor
Burton H. Sage, Jr.
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.