Granted Patent
Utility
US 6,218,825 · App. 09/355,577
Current sensor with self-oscillating generator circuit
Inventor:
Friedrich Lenhard
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Jul 30, 1999
Inventor
Friedrich Lenhard
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.