Granted Patent
Utility
US 6,594,688 · App. 09/879,460
Dedicated echo canceler for a workstation
Inventors:
Lester F. Ludwig, J. Chris Lauwers, Keith A. Lantz, Gerald J. Burnett, Emmett R. Burns
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Jun 11, 2001
Inventors
Lester F. Ludwig
J. Chris Lauwers
Keith A. Lantz
Gerald J. Burnett
Emmett R. Burns
Assignee (at issue)
COLLABORATION PROPERTIES, 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.