Granted Patent
Utility
US 5,284,150 · App. 07/962,364
Tonometry system for determining blood pressure
Inventors:
Robert D. Butterfield, Kenneth J. Pytel, Charles R. Holdaway, Stephen A. Martin
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Oct 16, 1992
Inventors
Robert D. Butterfield
Kenneth J. Pytel
Charles R. Holdaway
Stephen A. Martin
Assignee (at issue)
IVAC Corporation
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.