Granted Patent
Utility
US 6,337,638 · App. 09/558,316
Vehicle warning system and method based on speed differential
Inventors:
Cary Lee Bates, Michael Martin Tomashek
Patented Case
View Patent ↗
Granted: Jan 8, 2002
Filed: Apr 25, 2000
Inventors
Cary Lee Bates
Michael Martin Tomashek
Assignee (at issue)
International Business Machines 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.