Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5745552 | Line communication systems incorporating mains electricity conductors for communications | Gordon William Chambers | 1998-04-28 |
| 5493435 | Optic switching | Geoffrey Chopping | 1996-02-20 |
| 5303232 | High performance asynchronous transfer mode switch | Richard John Proctor, Thomas S. Maddern, Mark T. Jeffrey | 1994-04-12 |
| 5170391 | Fault detection and bandwidth monitoring means for a packet switching arrangement | John S. Arnold | 1992-12-08 |
| 5109378 | Asynchronous time division switch with increased traffic handling capability | Richard John Proctor, Thomas S. Maddern | 1992-04-28 |
| 4794644 | Method of secured communications in a telecommunications system | Mahir Ozdamar, Geoffrey Chopping | 1988-12-27 |
| 4648090 | Arrangement for controlling switched speech or data communication in a communications exchange | Thomas S. Maddern | 1987-03-03 |
| 4535442 | Digital switching network for telecommunications exchange | Thomas S. Maddern, John W. Ansell | 1985-08-13 |
| 4530089 | Telecommunications digital switchblock utilizing control switch state maps | John W. Ansell, Thomas S. Maddern | 1985-07-16 |
| 4425640 | Telecommunications switching network using digital switching modules | Thomas S. Maddern | 1984-01-10 |
| 4425641 | Time division multiplex telecommunication digital switching modules | Joseph A. French, Thomas S. Maddern | 1984-01-10 |
| 4365330 | Channel zero switching arrangements for digital telecommunication exchanges | Geoffrey Chopping, Robert Moberly | 1982-12-21 |
| 4300230 | Digital switching arrangements for stored program control telecommunications systems | Allen Parkinson, Michael G Foxton, Frederick H. Rees, Graham Howard, Anthony E. Shuttleworth | 1981-11-10 |
| 4197523 | Digital telecommunication switching systems | Stephen Niewiadomski, Frederick H. Rees, Anthony E. Shuttleworth | 1980-04-08 |