Granted Patent
Utility
US 6,487,244 · App. 09/307,454
System and method for transmitting special marker symbol
Inventor:
William L. Betts
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: May 7, 1999
Inventor
William L. Betts
Assignee (at issue)
PARADYNE CORPORATION
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.