<P> Dyson developed 5,127 prototype designs between 1979 and 1984 . The first prototype vacuum cleaner , a red and blue machine , brought Dyson little success , as he struggled to find a licensee for his machine in the UK and America . Manufacturing companies like Hoover did not want to license the design , probably because the vacuum bag market was worth $500 m so Dyson was a threat to their profits . </P>
<P> Dyson developed 5,127 prototype designs between 1979 and 1984 . The first prototype vacuum cleaner , a red and blue machine , brought Dyson little success , as he struggled to find a licensee for his machine in the UK and America . Manufacturing companies like Hoover did not want to license the design , probably because the vacuum bag market was worth $500 m so Dyson was a threat to their profits . </P>
when was the first dyson vacuum cleaner invented
when was the first dyson vacuum cleaner invented
1979
1979