Granted Patent
Utility
US 4,557,722 · App. 06/484,571
Fill port for an implantable dispensing system
Inventor:
Donald L. Harris
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Apr 13, 1983
Inventor
Donald L. Harris
Assignee (at issue)
CORDIS 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.