Philip Morris v RAI: British American Tobacco patent for heated tobacco device revoked for lack of inventive step and added matter Hogarth Chambers E cigarettes slow to light up the market warns American Tobacco This is Money British American Tobacco unveils latest vaping product Better Retailing BRITISH AMERICAN TOBACCO LEADS THE CHARGE AGAINST ILLEGAL VAPES SMOKO E Cigarettes British American Tobacco cuts 2,300 jobs in shift towards vaping British American Tobacco The Guardian