Granted Patent
Utility
US 5,595,287 · App. 08/328,650
Spring drive for a switching apparatus
Inventor:
Rolf Niklaus
Patented Case
View Patent ↗
Granted: Jan 21, 1997
Filed: Oct 25, 1994
Inventor
Rolf Niklaus
Assignee (at issue)
GEC Alsthom T&D SA
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.