Granted Patent
Utility
US 6,131,656 · App. 09/235,431
Bridge plug for a well bore
Inventor:
William Jani
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Jan 22, 1999
Inventor
William Jani
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.