Granted Patent
Utility
US 6,796,376 · App. 10/189,887
Composite bridge plug system
Inventor:
Warren Lynn Frazier
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Jul 2, 2002
Inventor
Warren Lynn Frazier
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.