Granted Patent
Utility
US 4,944,757 · App. 07/268,056
Modulator knee prosthesis system
Inventors:
David Martinez, Roger G. Carignan, S. David Stulberg
Patented Case
View Patent ↗
Granted: Jul 31, 1990
Filed: Nov 7, 1988
Inventors
David Martinez
Roger G. Carignan
S. David Stulberg
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.