Granted Patent
Utility
US 4,448,203 · App. 06/422,927
Electromyographic diagnostic device
Inventors:
Eugene Williamson, Stephen Michael Thompson, Derek K. Evans
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 24, 1982
Inventors
Eugene Williamson
Stephen Michael Thompson
Derek K. Evans
Assignee (at issue)
A Company Incorporated
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.