Granted Patent
Utility
US 6,421,330 · App. 09/301,474
Apparatus and method for expanding service area of CDMA mobile communication system
Inventors:
Chae Hun Chung, Yang SHIN
Patented Case
View Patent ↗
Granted: Jul 16, 2002
Filed: Apr 28, 1999
Inventors
Chae Hun Chung
Yang SHIN
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.