Granted Patent
Utility
US 6,256,534 · App. 09/132,225
Implantable defibrillator with countershock synchronized to P-wave
Inventor:
Roger Dahl
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Aug 11, 1998
Inventor
Roger Dahl
Assignee (at issue)
Angeion Corp.
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.