Granted Patent
Utility
US 6,609,049 · App. 10/184,929
Method and system for automatically activating a warning device on a train
Inventors:
Mark Edward Kane, James Francis Shockley, Harrison Thomas Hickenlooper
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Jul 1, 2002
Inventors
Mark Edward Kane
James Francis Shockley
Harrison Thomas Hickenlooper
Assignee (at issue)
Quantum Engineering, 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.