Granted Patent
Utility
US 4,618,621 · App. 06/653,385
Method for treating medical conditions involving cerebral ischemia
Inventor:
Andrew Tang
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Sep 21, 1984
Inventor
Andrew Tang
Assignee (at issue)
The Upjohn Co.
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.