Granted Patent
Utility
US 4,696,296 · App. 06/916,341
Aspirating/ventilating apparatus
Inventor:
Darrel Palmer
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Oct 7, 1986
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.