Patent Explorer
Browse, filter, and analyze 3 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3993978A | Solid state crosspoint circuit arrangement for use in a telephone exchange | Telent Technologies Services Ltd | Expired / Lapsed | 1974-09-26 | 1976-11-23 | 1994-09-26 | 0.0 yrs | 13 | |
| US3883855A | Control system for a digital switching network | Telent Technologies Services Ltd | Expired / Lapsed | 1974-04-05 | 1975-05-13 | 1994-04-05 | 0.0 yrs | 14 | |
| US3715503A | Automatic transfer arrangement for telephone system | Telent Technologies Services Ltd | Expired / Lapsed | 1971-02-16 | 1973-02-06 | 1991-02-16 | 0.0 yrs | 6 |