Granted Patent
Utility
US 4,872,579 · App. 07/179,800
Aspirating/ventilating apparatus and method
Inventor:
Darrel Palmer
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Apr 11, 1988
Inventor
Darrel Palmer
Assignee (at issue)
Ballard Medical Products
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.