Accomplishments

1960s

1970s

1980s

1990s

2000s

Patents

4061887
Key telephone adapter for electronic telephone system
4361734
Trunk interface circuit with current compensation
4579406
Printed circuit board connector system
4586175
Method for operating a packet bus for transmission of asynchronous and pseudo-synchronous signals
4689816
Three relay C.O. trunk interface
4731827
Interswitch line circuit
4975903
Digital timeslot and signaling bus in a digital PBX switch
5557506
Expandable data processing chassis and method of assembly there of
5559873
Telephone privacy device with conference indicator features
5689406
Expandable data processing chassis and method of assembly there of
5726506
Hot insertion power arrangement
6020732
Flux cancelling transformer line circuit
6529596
Web based control of telephone
6532288
Tandem access control processor connected to the public switched telephone network for controlling features
6574328
Telephone call control system for the public switched telephone network
11178050
Neural network for secure data transport, system and method