Granted Patent
Utility
US 4,169,293 · App. 05/876,027
Hydrotherapy vessel level control
Inventor:
Albert E. Weaver
Patented Case
View Patent ↗
Granted: Oct 2, 1979
Filed: Feb 8, 1978
Inventor
Albert E. Weaver
Assignee (at issue)
Chanso Corporation
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.