Granted Patent
Utility
US 4,738,657 · App. 06/781,965
Self-sealing injection reservoir
Inventors:
John C. Hancock, William Dubrul, Charles J. Heyler, III
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Sep 30, 1985
Inventors
John C. Hancock
William Dubrul
Charles J. Heyler, III
Assignee (at issue)
McGhan Medical 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.