Granted Patent
Utility
US 5,638,017 · App. 08/551,784
Pulse width modulation circuit
Inventor:
Ho Hyun Kim
Patented Case
View Patent ↗
Granted: Jun 10, 1997
Filed: Nov 7, 1995
Inventor
Ho Hyun Kim
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.