Granted Patent
Utility
US 4,754,454 · App. 06/931,318
Synchronization circuitry for duplex digital span equipment
Inventors:
Robert E. Renner, Kevin Williams
Patented Case
View Patent ↗
Granted: Jun 28, 1988
Filed: Nov 17, 1986
Inventors
Robert E. Renner
Kevin Williams
Assignee (at issue)
GTE Communication Systems 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.