Granted Patent
Utility
US 5,480,196 · App. 08/288,725
Ductile iron pipe joint employing a coupling and coupling therefor
Inventor:
William Thomas Adams, Jr.
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Aug 15, 1994
Inventor
William Thomas Adams, Jr.
Assignee (at issue)
AMERICAN Cast Iron Pipe Company
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.