Granted Patent
Utility
US 6,388,549 · App. 09/423,862
Magnet core
Inventor:
Friedrich Lenhard
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Nov 15, 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.