Granted Patent
Utility
US 6,565,125 · App. 09/843,503
Coupling assembly for joining plastic and metal pipes
Inventor:
David Robison
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Apr 26, 2001
Inventor
David Robison
Assignee (at issue)
Perfection Holdings LLC
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.