Granted Patent
Utility
US 4,154,238 · App. 05/754,133
Apparatus and process using second derivative of oscillometric waveform for producing sphygmometric information
Inventor:
William T. Link
Patented Case
View Patent ↗
Granted: May 15, 1979
Filed: Dec 27, 1976
Inventor
William T. Link
Assignee (at issue)
American Optical 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.