IP Library › Granted Patent US 4,393,490
Granted Patent Utility
US 4,393,490 · App. 06/176,136

Digital telecommunications switches network with in-built fault identification

Inventor: Ernest Culley
Patented Case View Patent ↗
Granted: Jul 12, 1983 Filed: Aug 7, 1980
Inventor
Ernest Culley
Assignees (at issue)
The Plessey Company PLC
The Plessey Company PLC

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Quick Facts
Patent No.
US 4,393,490
App. No.
06/176,136
Filed
1980-08-07
Granted
1983-07-12
Kind
A