Granted Patent
Utility
US 4,538,036 · App. 06/648,232
Electrical switching apparatus
Inventors:
Andrew Heinrich, Richard L. Oljace
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: May 18, 1982
Inventors
Andrew Heinrich
Richard L. Oljace
Assignee (at issue)
Caterpillar Tractor 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.