Granted Patent
Utility
US 4,408,745 · App. 06/215,515
Swivel valve
Inventors:
Richard H. Swiers, Richard G. Parkison
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Dec 11, 1980
Inventors
Richard H. Swiers
Richard G. Parkison
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.