Granted Patent
Utility
US 4,253,181 · App. 06/006,881
Synchronization arrangements for digital switching centers
Inventor:
Laurence E. Watten
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Jan 25, 1979
Inventor
Laurence E. Watten
Assignee (at issue)
Plessey Handel Und Investments AG
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.