Granted Patent
Utility
US 5,220,156 · App. 07/734,496
Stable control system with positive feedback characteristic
Inventor:
Martin Schuyler
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jul 23, 1991
Inventor
Martin Schuyler
Assignee (at issue)
Cox & Company, 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.