Granted Patent
Utility
US 4,629,686 · App. 06/388,136
Apparatus for delivering a controlled dosage of a chemical substance
Inventor:
Micheal Gruenberg
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Jun 14, 1982
Inventor
Micheal Gruenberg
Assignee (at issue)
Endotronics, 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.