Granted Patent
Utility
US 5,054,513 · App. 07/569,995
Protective system for P-trap
Inventors:
Steven R. Trueb, Thomas W. Trueb
Patented Case
View Patent ↗
Granted: Oct 8, 1991
Filed: Aug 20, 1990
Inventors
Steven R. Trueb
Thomas W. Trueb
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.