Granted Patent
Utility
US 5,652,552 · App. 08/619,965
Phase modulator
Inventor:
Chan Hyung Chung
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Mar 20, 1996
Inventor
Chan Hyung Chung
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.