Granted Patent
Utility
US 5,210,784 · App. 07/722,921
Adaptive speakerphone system
Inventors:
William Wang, Richard M. Reich
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Jun 28, 1991
Inventors
William Wang
Richard M. Reich
Assignee (at issue)
Lifeline Systems Company
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.