Granted Patent
Utility
US 4,918,768 · App. 07/122,051
Air valve for spas and baths
Inventors:
Daniel A. DeSousa, William G. Badley, Ralph D'Innocente
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Nov 18, 1987
Inventors
Daniel A. DeSousa
William G. Badley
Ralph D'Innocente
Assignee (at issue)
Jacuzzi Whirlpool Bath
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.