Granted Patent
Utility
US 4,893,636 · App. 07/165,806
Medical container stopper
Inventors:
Boyce W. Cook, William R. Fiehler
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: Mar 9, 1988
Inventors
Boyce W. Cook
William R. Fiehler
Assignee (at issue)
Sherwood Medical 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.