Granted Patent
Utility
US 4,352,213 · App. 06/205,002
Linkage adjustment arrangement for a bathtub drain assembly
Inventor:
Robert R. Watts
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Nov 7, 1980
Inventor
Robert R. Watts
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.