Granted Patent
Utility
US 5,604,657 · App. 08/329,424
Relay circuit having a test switch and method of testing a relay circuit
Inventor:
Roger P. Michaud
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Oct 27, 1994
Inventor
Roger P. Michaud
Assignee (at issue)
Erie Manufacturing 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.