Granted Patent
Utility
US 5,203,038 · App. 07/729,230
Water level sensing apparatus for a swimming pool
Inventor:
Michael John Gibbs
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jul 12, 1991
Inventor
Michael John Gibbs
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.