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Reports of Patent, Design and Trade Mark Cases 2002 119(12):465-495; doi:10.1093/rpc/2002rpc22
© 2002 by Crown Copyright
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© Crown Copyright

[2002] R.P.C. 22

DYSON APPLIANCES LTD v. HOOVER LTD

Court of Appeal

Before: LORD JUSTICE ALDOUS, LORD JUSTICE SEDLEY, LADY JUSTICE ARDEN October 4, 20011

[2001] EWCA Civ 1440; [2002] R.P.C. 22

Patent—Vacuum cleaner—Inventive step—Whether commercial motivation relevant—Awareness of need in commercial milieu—Mindset in favour of bags—Court of Appeal slow to interfere with judge's conclusion on obviousness unless wrong in principle—Construction of claim—Whether evidence helpful—Novelty—Infringement—Judgment that patent valid and infringed upheld.

1 Paragraph numbers in this judgment are as assigned by the court.


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