Granted Patent
Utility
US 4,663,613 · App. 06/757,472
Protective system for hot tub water and power supply
Inventors:
William F. Raleigh, Patrick J. Keegan
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Jul 22, 1985
Inventors
William F. Raleigh
Patrick J. Keegan
Assignee (at issue)
Teledyne Industries, 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.