Granted Patent
Utility
US 6,560,439 · App. 09/181,603
Satellite paging channels
Inventor:
Mark Grayson
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Oct 28, 1998
Inventor
Mark Grayson
Assignee (at issue)
ICO Services Limited
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.