Granted Patent
Utility
US 6,667,739 · App. 10/134,958
Electronic whiteboard system eraser
Inventors:
Stephen Atwood, Bernard O. Geaghan
Patented Case
View Patent ↗
Granted: Dec 23, 2003
Filed: Apr 29, 2002
Inventors
Stephen Atwood
Bernard O. Geaghan
Assignee (at issue)
POLYVISION 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.