Granted Patent
Utility
US 5,797,968 · App. 08/769,046
Electrotherapy circuit for producing current waveform with sawtooth ripple
Inventors:
Michael L. Lopin, Shervin Ayati
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Dec 18, 1996
Inventors
Michael L. Lopin
Shervin Ayati
Assignee (at issue)
ZMD 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.