Granted Patent
Utility
US 5,090,780 · App. 07/695,079
Binary weighted digital flow regulating system
Inventor:
Terry D. Powell
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: May 3, 1991
Inventor
Terry D. Powell
Assignee (at issue)
Westinghouse Air Brake Co.
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.