It was developed from an industrial cyclone cleaner Mr Dyson designed for his wheelbarrow factory. Mr Dyson only started manufacturing the cleaners when his ideas were turned down by a string of manufacturers. His lawyer told a seven day High Court hearing in July that getting the industry interested had been like 'extracting teeth'. The judge in Tuesday's ruling accepted that before Mr Dyson registered his patent in 1980, the idea of a bagless vacuum cleaner had been 'heresy'. He also noted that before Dyson, a large slice of the manufacturer's profits came from the sale of replacement bags.
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