Granted Patent
Utility
US 6,742,816 · App. 09/764,473
Pipe flange and piping system
Inventor:
John W. Rocheleau
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Jan 17, 2001
Inventor
John W. Rocheleau
Assignee (at issue)
TACO, INC.
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.