Granted Patent
Utility
US 6,794,860 · App. 10/469,122
Transformer for a current sensor
Inventor:
Stefan Schafer
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Jan 30, 2004
Inventor
Stefan Schafer
Assignee (at issue)
Vacuumschmelze GmbH & Co. KG
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.