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Stereobelt:
A portable personal stereo audio cassette player, called Stereobelt, was first invented by the German-Brazilian Andreas Pavel in 1972. Pavel filed a patent for his Stereobelt in Italy in 1977, followed by patent applications in the U.S., Germany, the United Kingdom and Japan by the end of 1978. His patent applications in the U.S. and the U.K. were rejected.
In 1979, Sony began selling the popular Walkman, and in 1980 started legal talks with Pavel regarding a royalty fee. In 1986 Sony finally agreed to pay royalties to Pavel, but only for sales in Germany, and only for a few models, and refused to acknowledge him as the inventor of the device.
In 2001, Pavel threatened Sony with legal suits in every country in which he had patented his invention. The corporation agreed to resume talks with Pavel and a settlement was finally reached in 2003. The exact settlement fee is a closely guarded secret but European press accounts said that Pavel received a cash settlement for damages in excess of $10,000,000 and is now also receiving royalties on some Walkman sales. The settlement also includes a clause which will prevent Pavel from bringing future law suits.
The settlement grants Pavel the recognition from Sony that he was the original inventor of the personal stereo; this apparently could only be achieved after the death of Morita, the founder of Sony and its previously recognised creator.