Granted Patent
Utility
US 4,168,705 · App. 05/801,622
Float and check valve for hydrotherapy unit air intake
Inventor:
Alfred Raab
Patented Case
View Patent ↗
Granted: Sep 25, 1979
Filed: May 31, 1977
Inventor
Alfred Raab
Assignee (at issue)
Jacuzzi Bros., 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.