Plessey Company plc was a British electronics, defence and telecommunications company.
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Plessey Company plc was a British electronics, defence and telecommunications company.
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Heyne later became the managing director and chairman of Plessey and was one of the key figures in the development of Plessey during the 1920s and 1930s.
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An early customer of Plessey was a galvanising company called British Electro Chemists.
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Byron's son Allen George Clark joined the company in 1921, and went on to become a driving force behind the development of Plessey, followed later by his sons John Allen Clark, and Michael William Clark, both of whom rose to prominent positions in the company.
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Plessey produced the first British-made portable radio in the same year.
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Plessey became one of the largest manufacturers in this field as the radio and television industries grew.
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In 1936, Plessey obtained a number of important manufacturing licences from American companies such as Breeze Corporation for aircraft multi-pin electrical connectors, Federal Laboratories for Coffman starters, and Pump Engineering Services Corporation for the manufacture of Pesco fuel pumps.
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Plessey went on to produce large numbers of these fuel pumps for Rolls-Royce Merlin engines, and in 1940 the fuel pump for Britain's first jet engine was supplied by Plessey.
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Plessey produced an early integrated circuit model in 1957, before the patents of Jack St Clair Kilby of Texas Instruments and Robert Noyce of Fairchild.
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Plessey were partners in the development of the Atlas Computer in 1962 and in the development of digital telephone systems, including System X, from the late 1970s.
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Plessey pioneered the gathering and consolidation of accounting information from around the world using in-house software.
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Plessey was the lead contractor for the Ptarmigan communications system supplied to the British Army, which adopted the System 250 architecture.
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Again, Plessey rejected the offer and again it was referred to the MMC.
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GEC Plessey Semiconductors was purchased by Mitel Semiconductors of Canada in 1998.
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Plessey continues to operate in the Roborough site with leading-edge 150mm and 200mm wafer processing facilities to undertake design, test and assembly of products, and a comprehensive suite of photonic characterisation and applications laboratories.
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Tellumat continues to develop and manufacture Plessey-branded products as before and operates in the defence, telecommunications and contract manufacturing markets.
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Name is used to refer to a barcode symbology developed by Plessey, which is still used in some libraries and for shelf tags in retail stores, in part as a solution to their internal requirement for stock control.
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