Granted Patent
Utility
US 6,830,452 · App. 09/990,048
Computer training system with audible answers to spoken questions
Inventor:
Donald Spector
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Nov 20, 2001
Inventor
Donald Spector
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.