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 to announce smaller buyback in results but US vape approval is key broker LSE:BATS BRITISH AMERICAN TOBACCO LEADS THE CHARGE AGAINST ILLEGAL VAPES SMOKO E Cigarettes British American Tobacco Driving innovation British American Tobacco launches' GLO HYPER PRO 'in Serbia