Granted Patent
Utility
US 6,177,813 · App. 09/311,588
Low frequency detection circuit
Inventor:
Ju Han Kim
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: May 14, 1999
Inventor
Ju Han Kim
Assignee (at issue)
Hyundai Electronics Industries Co. Ltd.
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.