Granted Patent
Utility
US 5,197,638 · App. 07/785,588
Self sealing product delivery system
Inventor:
Robert W. Wood
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Oct 30, 1991
Inventor
Robert W. Wood
Assignee (at issue)
Allergan, 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.