Granted Patent
Utility
US 6,777,628 · App. 10/451,218
Interlocking device for circuit breakers
Inventors:
Lucio Azzola, Osvaldo Carrara
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Jun 20, 2003
Inventors
Lucio Azzola
Osvaldo Carrara
Assignee (at issue)
ABB Service S.R.L
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.