Granted Patent
Utility
US 4,545,402 · App. 06/599,405
Pressure-regulating valve with a force-feedback
Inventor:
Michael D. Lyons
Patented Case
View Patent ↗
Granted: Oct 8, 1985
Filed: Apr 12, 1984
Inventor
Michael D. Lyons
Assignee (at issue)
American Standard 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.