FRANCE TELECOM
1,234Patents
504Active
1,234Granted
55Portfolio score
Filing activity: Jan 24, 1991 → Jun 28, 2013 · 412 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5991413A | Process for the acceptance of a virtual prepaid card use request permitting the reuse of its serial number | Physics | 311 | Expired |
| US7689409B2 | Text language identification | Physics | 302 | Active |
| US8238947B2 | Method and installation for transmitting a message with predetermined duration of validity addressed to a subscriber terminal | Electricity | 296 | Active |
| US5990013A | Process for treating a semiconductor substrate comprising a surface-treatment step | Electricity | 281 | Expired |
| US7376632B1 | Model and method for using an interactive rational agent, multiagent server and system implementing same | Physics | 279 | Expired |
| US7203486B2 | Wireless system having a dynamically configured multimodal user interface based on user preferences | Electricity | 267 | Expired |
| US7003519B1 | Method of thematic classification of documents, themetic classification module, and search engine incorporating such a module | Emerging Cross-Sectional Technologies | 260 | Expired |
| US5864806A | Decision-directed frame-synchronous adaptive equalization filtering of a speech signal by implementing a hidden markov model | Physics | 249 | Expired |
| US5446747A | Error-correction coding method with at least two systematic convolutional codings in parallel, corresponding iterative decoding method, decoding module and decoder | Electricity | 237 | Expired |
| US5684385A | Customized storage, high voltage, photovoltaic power station | Emerging Cross-Sectional Technologies | 228 | Expired |
| US6713356B1 | Method for making a semiconductor device comprising a stack alternately consisting of silicon layers and dielectric material layers | Electricity | 202 | Expired |
| US5465375A | Multiprocessor system with cascaded modules combining processors through a programmable logic cell array | Physics | 194 | Expired |
| US5563897A | Method for detecting information bits processed by concatenated block codes | Electricity | 171 | Expired |
| US5452288A | Method for the transmission of digital data in radio paging systems and corresponding radio paging receiver | Electricity | 164 | Expired |
| US6014646A | Process for making a payment using an account manager | Physics | 154 | Expired |
| US5740232A | Smart card based system for telephone-securized transactions | Physics | 144 | Expired |
| US6307939A | Method and equipment for allocating to a television program, which is already conditionally accessed, a complementary conditional access | Electricity | 143 | Expired |
| US5661806A | Process of combined authentication of a telecommunication terminal and of a user module | Electricity | 142 | Expired |
| US5383208A | Device and method to control the output power of laser diodes | Electricity | 134 | Expired |
| US5154180A | Method and device for determining a subject's sleep state by processing an electroencephalographic signal | Human Necessities | 132 | Expired |
| US5307376A | Device for the coherent demodulation of time-frequency interlaced digital data, with estimation of the frequency response of the transmission channel and threshold, and corresponsing transmitter | Electricity | 130 | Expired |
| US5237564A | Frame switching relay for asynchronous digital network | Electricity | 112 | Expired |
| US6122763A | Process for transmitting information bits with error correction coding and decoder for the implementation of this process | Electricity | 107 | Expired |
| US5264689A | Rechargeable prepaid memory card with both unit and page counters | Physics | 105 | Expired |
| US7283153B2 | Home-based remote medical assistance | Physics | 102 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.