Granted Patent
Utility
US 5,803,125 · App. 08/857,093
Adjustable valve box
Inventor:
William C. Bliss
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: May 15, 1997
Inventor
William C. Bliss
Assignee (at issue)
Tyler Pipe Company, a division of Ransom Industries, LP
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.