Granted Patent
Utility
US 5,280,258 · App. 07/887,252
Spring-powered operator for a power circuit breaker
Inventor:
Ray W. Opperthauser
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: May 22, 1992
Inventor
Ray W. Opperthauser
Assignee (at issue)
SIEMENS ENERGY & AUTOMATION, 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.