Granted Patent
Utility
US 5,122,989 · App. 07/766,599
Digital echo repeater
Inventors:
David M. Pirie, Christopher W. Brown
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Sep 26, 1991
Inventors
David M. Pirie
Christopher W. Brown
Assignee (at issue)
The United States of America, as represented by the Secretary of the Navy
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.