STC PLC
194Patents
0Active
194Granted
42Portfolio score
Filing activity: May 15, 1984 → Sep 9, 1991
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5208812A | Telecommunications system | Electricity | 186 | Expired |
| US4844613A | Optical surface plasmon sensor device | Emerging Cross-Sectional Technologies | 148 | Expired |
| US4935661A | Pulsed plasma apparatus and process | Chemistry; Metallurgy | 145 | Expired |
| US4583239A | Digital demodulator arrangement for quadrature signals | Electricity | 115 | Expired |
| US4707831A | Packet switching system | Electricity | 93 | Expired |
| US5228026A | Technique for time-division duplex cordless telecommunication | Electricity | 75 | Expired |
| US5117196A | Optical amplifier gain control | Electricity | 68 | Expired |
| US5237593A | Sequence synchronisation | Electricity | 68 | Expired |
| US4953939A | Optical fibre transmission systems | Physics | 63 | Expired |
| US4910750A | Data transmission system | Electricity | 61 | Expired |
| US5079521A | Fractional-N frequency synthesizer using delta-sigma modulator in divider control circuit | Electricity | 60 | Expired |
| US4705345A | Addressing liquid crystal cells using unipolar strobe pulses | Physics | 58 | Expired |
| US4731796A | Multi-mode radio transceiver | Electricity | 56 | Expired |
| US5161153A | Synchronous network | Electricity | 55 | Expired |
| US4720781A | Data processing terminal having support module and portable display module for liquid crystal display | Physics | 50 | Expired |
| US4954865A | Integrated circuits | Emerging Cross-Sectional Technologies | 50 | Expired |
| US4772571A | Process of self aligned nitridation of TiSi.sub.2 to form TiN/TiSi.sub.2 contact | Emerging Cross-Sectional Technologies | 49 | Expired |
| US5115444A | Multichannel cavity laser | Electricity | 48 | Expired |
| US5278991A | Handover techniques | Electricity | 47 | Expired |
| US4706242A | Digital telecommunication system | Electricity | 45 | Expired |
| US5265263A | Handover techniques | Electricity | 44 | Expired |
| US5121644A | Deploying cables in pipelines | Electricity | 43 | Expired |
| US4932038A | Phase modulator circuit | Electricity | 42 | Expired |
| US4718121A | Balanced coherent receiver | Electricity | 38 | Expired |
| US4844581A | Optical transmission package | Physics | 37 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.