Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Subscriber circuit link interface for an automatic telephone exchange

Subscriber circuit link interface for an automatic telephone exchange

US Patent 4752952 · Granted Jun 21, 1988

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Node and onboard station for setting up at any time a call involving a passenger2007
Method of and system for controlling a frequency via an asynchronous transmissio2004
Node and onboard station for setting up at any time a call involving a passenger2004
Onboard system in a vehicle and central system for locating the vehicle accurate2004
Chaining arrangement between intermediate modules, particularly of repeater type1997
Method and device for managing access to the transmission medium of a multiservi1992
Ringing signal generator for a subscriber telephone set1986
Ringing signal generator for a subscriber telephone set1986
Ringing signal generator for a subscriber telephone set1986
Four wire to two wire converter1983
Four wire to two wire converter1983
Four wire to two wire converter1983