Granted Patent
Utility
US 4,237,900 · App. 06/012,142
Implantable calibration means and calibration method for an implantable body transducer
Inventors:
Joseph H. Schulman, Douglas G. Ritchie
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Feb 14, 1979
Inventors
Joseph H. Schulman
Douglas G. Ritchie
Assignee (at issue)
Pacesetter Systems, Inc.
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.