Granted Patent
Utility
US 6,522,874 · App. 09/500,514
User key validation to prevent fraud during system handoffs
Inventors:
Thomas Chu, Darryl Sale
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Feb 9, 2000
Inventors
Thomas Chu
Darryl Sale
Assignee (at issue)
Motorola, 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.