Granted Patent
Utility
US 4,771,472 · App. 07/038,259
Method and apparatus for improving voice intelligibility in high noise environments
Inventors:
John M. Williams, Donald P. Warther, Robert C. Lawson
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Apr 14, 1987
Inventors
John M. Williams
Donald P. Warther
Robert C. Lawson
Assignee (at issue)
Hughes Aircraft 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.