Granted Patent
Utility
US 5,243,993 · App. 07/722,800
Apparatus and method for measuring heart rate
Inventors:
Donald J. Alexander, Allen J. Fuller, William H. Englehardt, Douglas B. MacDonald, Olgerts J. Svilans, Robert A. Bonner
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Jun 28, 1991
Inventors
Donald J. Alexander
Allen J. Fuller
William H. Englehardt
Douglas B. MacDonald
Olgerts J. Svilans
Robert A. Bonner
Assignee (at issue)
Life Fitness, LLC
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.