Granted Patent
Utility
US 6,469,601 · App. 10/127,695
Under-voltage tripping device with early-operation auxiliary switch for circuit breaker
Inventors:
Masao Miura, Koji Asakawa
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Apr 23, 2002
Inventors
Masao Miura
Koji Asakawa
Assignee (at issue)
FUJI ELECTRIC CO., LTD.
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.