Granted Patent
Utility
US 4,622,219 · App. 06/505,326
Method of inducing local anesthesia using microdroplets of a general anesthetic
Inventor:
Duncan H. Haynes
Patented Case
View Patent ↗
Granted: Nov 11, 1986
Filed: Jun 17, 1983
Inventor
Duncan H. Haynes
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.