Granted Patent
Utility
US 4,898,174 · App. 07/189,652
Automatic ventilator
Inventor:
Thomas F. Fangrow
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: May 3, 1988
Inventor
Thomas F. Fangrow
Assignee (at issue)
Life Support Products, Inc.
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.