Granted Patent
Utility
US 6,323,907 · App. 08/940,030
Frequency converter
Inventor:
Sung-Hoon Hwang
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Sep 29, 1997
Inventor
Sung-Hoon Hwang
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.