Granted Patent
Utility
US 5,209,256 · App. 07/864,283
Sealing arrangements
Inventor:
Edward T. Thornburrow
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Apr 6, 1992
Inventor
Edward T. Thornburrow
Assignee (at issue)
Cooper Industries Holdings
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.