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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 7136047 | Software multi-tap input system and method A software multi-tap input method requires only two taps to input most characters. This is especially beneficial for languages where existing multi-tap methods require on average more than two strokes per character, and where handwriting recognition is currently an ... | 11/14/2006 |
| 7030731 | Wireless identification systems and protocols Monitoring systems and protocols are disclosed that are flexible in mode operation and format depending on the environment in which they are used. Such monitoring systems and protocols are able to change their utilization automatically, or by received instruction to... | 04/18/2006 |
| 6463104 | Method of increasing coding levels This invention concerns a method of increasing coding levels. In this method, an increase in levels is achieved with multi-level coding, where uninterrupted periodic sequences such as an alternating current of the same frequency and phase relation are pro... | 10/08/2002 |
| 6072829 | Method of higher value step encoding To achieve economy of a transmission path with good quality of transmission and low expenditure compared to previous codes such as 4PSK-64PSK, the invention provides higher-value pulse duration encoding, such that there is provided only an alternating cur... | 06/06/2000 |
| 5587797 | Process for encoding and transmitting information The present invention relates to process for encoding and transmitting information wherein data, digitalized speech, image, or documents, optionally in colour, are encoded by multilevel combination code with multilevel code elements into a signal, in part... | 12/24/1996 |
| 5583892 | Method and system for performing transmission of digital data by coding bit information into the shape of a pulse and decoding the bit information from the shape of the pulse Digital information is transmitted by generating coded signals in the form of pulses on the basis of binary digital information and decoding the coded signals into the binary digital information, the pulses being coded in the time domain and being of at l... | 12/10/1996 |
| 4670739 | Communication system especially useful as an incident location reporting security system The Incident Location Reporting Security System pertains to a device that is capable of determining instantaneously, via the use of pulse-width coded modulation, the location of incidences such as burglary, robbery and fire. Detailed multi-point monitorin... | 06/02/1987 |
| 4349913 | Method and apparatus for reducing the demand on the number of transferred bits when transferring PCM information A method and an arrangement for reducing the demand on the number of transferred bits when transferring PCM information. Polarity and amplitude information are transmitted from a transmitter side to a receiver side, expressed by binary code words, while a... | 09/14/1982 |
