Granted Patent
Utility
US 4,627,462 · App. 06/481,192
Selectable function valve device
Inventor:
Michael D. Lyons
Patented Case
View Patent ↗
Granted: Dec 9, 1986
Filed: Apr 1, 1983
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.