Granted Patent
Utility
US 5,689,097 · App. 08/538,448
Arc-resistant switchgear enclosure with arcing chamber venting structure
Inventors:
Albert H. Aufermann, Robert S. Karnbach
Patented Case
View Patent ↗
Granted: Nov 18, 1997
Filed: Oct 3, 1995
Inventors
Albert H. Aufermann
Robert S. Karnbach
Assignee (at issue)
ABB Power T&D Company Inc.
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.