Granted Patent
Utility
US 6,237,963 · App. 09/206,043
Service riser
Inventor:
Howard Hall
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Dec 4, 1998
Inventor
Howard Hall
Assignee (at issue)
UPONOR INNOVATION AB
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.