Granted Patent
Utility
US 5,648,922 · App. 08/422,413
Digital filter
Inventor:
DONG-HWAN HAN
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Apr 14, 1995
Inventor
DONG-HWAN HAN
Assignee (at issue)
LG Semicon 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.