Granted Patent
Utility
US 4,951,972 · App. 07/382,530
Rotatable sealing assemblies
Inventors:
Brian MacIntyre, Frank Close, Sean McAvoy
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jul 20, 1989
Inventors
Brian MacIntyre
Frank Close
Sean McAvoy
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.