Granted Patent
Utility
US 6,249,257 · App. 09/615,915
Switched, dual helical, retractable, dual band antenna for cellular communications
Inventors:
Jon J. Powles, Todd M. Blacksher
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Jul 13, 2000
Inventors
Jon J. Powles
Todd M. Blacksher
Assignee (at issue)
Centurion Wireless Technologies, Inc.
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.