Granted Patent
Utility
US 4,568,804 · App. 06/529,393
High voltage vacuum type circuit interrupter
Inventor:
Elmer L. Luehring
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Sep 6, 1983
Inventor
Elmer L. Luehring
Assignee (at issue)
Joslyn Mfg. and Supply Co.
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.