Granted Patent
Utility
US 5,019,757 · App. 07/495,419
Method and apparatus for controlling a blower motor in an air handling system to provide constant pressure
Inventor:
Brian L. Beifus
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Mar 19, 1990
Inventor
Brian L. Beifus
Assignee (at issue)
General Electric Company
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.