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Kane Kramer
Kane Kramer is a British inventor and businessman. He is credited with the initial invention of the digital audio player, in 1979.〔Boffey, Daniel (Apple admit Briton DID invent iPod, but he's still not getting any money ) ''Daily Mail'', 2008-09-08. Retrieved on 2008-09-08.〕
==Invention of the DAP==
In 1981 Kramer filed for a UK patent for his newly conceived Digital Audio Player, the IXI. UK patent 2115996 was issued in 1985, and was issued in 1987. The player was the size of a credit card with a small LCD screen and navigation and volume buttons and would have held data of at least 8 MB of solid state bubble memory chip with a capacity of 3.5 minutes worth of audio. Plans were made for a 10 minute stereo memory card and the system was at one time fitted with a hard drive enabling over an hour of recorded digital music. His first investor was Sir Paul McCartney, later Kramer set up a company to promote IXI and five working prototypes were produced with 16 bit sampling at 44.1 kilohertz with the pre-production prototype being unveiled at the APRS Audio/Visual trade exhibition in October 1986. In a 2004 interview with ''The Guardian'', Kramer stated that the company at the time had "orders worth £60,000,000" (value at current day) for the device from the recording industry. However, in 1988 a boardroom dispute within Kramer's company and the subsequent failure to raise the £60,000 required to renew the patent resulted in the patent lapsing and entering the public domain, however he is still the owner of the designs.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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