Granted Patent
Utility
US 4,771,392 · App. 06/135,531
Programmable time varying control system and method
Inventor:
Burness C. Hall
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Mar 31, 1980
Inventor
Burness C. Hall
Assignee (at issue)
Edmund F. Bard
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.