Granted Patent
Utility
US 5,664,564 · App. 08/275,066
Aspirating/ventilating apparatus and method
Inventor:
Darrel Palmer
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Jul 13, 1994
Inventor
Darrel Palmer
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.