Granted Patent
Utility
US 4,877,021 · App. 07/039,620
Emergency airway surgical device
Inventors:
Gary Higer, Michael L. Mintz
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Apr 16, 1987
Inventors
Gary Higer
Michael L. Mintz
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.