Granted Patent
Utility
US 4,883,983 · App. 07/216,801
Switching system for plural load circuit
Inventors:
David T. Llewellyn, William J. Lichtenberger
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Jul 8, 1988
Inventors
David T. Llewellyn
William J. Lichtenberger
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.