Granted Patent
Utility
US 6,647,682 · App. 09/935,481
Drain pipe connector
Inventor:
Bernard Bishop
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Aug 23, 2001
Inventor
Bernard Bishop
Assignee (at issue)
Portals Plus, 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.