Measurement of intracardiac impedance in a multisite-type, active implantable medical device, in particular a pacemaker, defibrillator and/or cardiovertor

Granted: Mar 25, 2003 Filed: Mar 7, 2001

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.