Granted Patent
Utility
US 5,947,700 · App. 08/901,849
Fluid vacuum safety device for fluid transfer systems in swimming pools
Inventors:
Paul C. McKain, David Rizzi, Mark Fritze
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Jul 28, 1997
Inventors
Paul C. McKain
David Rizzi
Mark Fritze
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.