Granted Patent
Utility
US 4,234,006 · App. 06/002,631
Method of forming an opening in the outer enclosure of a gas-insulated electrical apparatus
Inventor:
Alan H. Cookson
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Jan 11, 1979
Inventor
Alan H. Cookson
Assignee (at issue)
Westinghouse Electric Company 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.