Granted Patent
Utility
US 4,979,245 · App. 07/339,751
Self-cleaning whirlpool system for bathtubs in general
Inventor:
Luigi Gandini
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Apr 18, 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.