Granted Patent
Utility
US 4,681,140 · App. 06/935,511
Tub-shower diverter apparatus
Inventor:
Dennis J. Hayman
Patented Case
View Patent ↗
Granted: Jul 21, 1987
Filed: Nov 26, 1986
Inventor
Dennis J. Hayman
Assignee (at issue)
United States Brass Corporation
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.