Apple has admitted that a British man played a part in developing the iconic and extremely profitable iPod, although he has so far received no money for his invention. In 1979 Kane Kramer from Hertfordshire filed a patent for a digital music player that stored just three and a half minutes of music to a solid state chip.

The patent’s listed ‘inventors’ are Timothy Sellers, Heather Grantham and Joshua Dersch. However, Page Up and Page Down keyboard buttons have been in existence for at least quarter of a century, as evidenced by this image of a 1981 IBM PC keyboard.