Granted Patent
Utility
US 4,969,217 · App. 07/343,554
Drain assembly for sanitary fixture with built-in overflow device
Inventor:
Luigi Gandini
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Apr 27, 1989
Inventor
Luigi Gandini
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.