Granted Patent
Utility
US 4,820,525 · App. 07/097,998
Transdermal drug delivery system
Inventors:
Thomas W. Leonard, Robin Enever, Karol K. Mikula
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Sep 17, 1987
Inventors
Thomas W. Leonard
Robin Enever
Karol K. Mikula
Assignee (at issue)
American Home Products Corp. (Del)
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.