Granted Patent
Utility
US 4,884,049 · App. 07/270,334
Circuit breaker overcurrent tripping device
Inventors:
Jun Oyama, Naoshi Uchida
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Nov 14, 1988
Inventors
Jun Oyama
Naoshi Uchida
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.