Granted Patent
Utility
US 4,312,123 · App. 06/019,849
Methods of making high voltage electrical insulators and oil-less bushings
Inventor:
Edward S. Wheeler
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Mar 12, 1979
Inventor
Edward S. Wheeler
Assignee (at issue)
Interpace Corporation
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.