Granted Patent
Utility
US 4,250,920 · App. 05/958,347
Valve for water treatment equipment
Inventor:
Paul L. Traylor
Patented Case
View Patent ↗
Granted: Feb 17, 1981
Filed: Nov 6, 1978
Inventor
Paul L. Traylor
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.