Granted Patent
Utility
US 5,807,306 · App. 08/291,394
Polymer matrix drug delivery apparatus
Inventors:
J. Edward Shapland, Keith R. Hildelbrand, Joel Racchini, Jin Shimada, Mark B. Knudson
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Aug 16, 1994
Inventors
J. Edward Shapland
Keith R. Hildelbrand
Joel Racchini
Jin Shimada
Mark B. Knudson
Assignee (at issue)
Cortrak Medical, Inc.
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.