Granted Patent
Utility
US 5,236,973 · App. 07/863,470
Electrical insulator
Inventors:
Anton Demarmels, Leopold Ritzer
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Apr 2, 1992
Inventors
Anton Demarmels
Leopold Ritzer
Assignee (at issue)
Asea Brown Boveri, S.A.
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.