Circuit for detection of the presence of a permanent magnet in the vicinity of an active medical device, in particular a pacemaker, defibrillator, cardiovertor and/or multisite device

Granted: Nov 26, 2002 Filed: Mar 23, 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.