The Kudelski Group is no stranger to patent infringement court cases, and this week its OpenTV subsidiary has returned fire against Yahoo by filing ten US patent infringements, following Yahoo’s complaint for a declaratory judgement against the middleware company back in January. The alleged infringements comprise the products and services Yahoo Smart TV, Yahoo Connected TV, Yahoo TV, Yahoo interactive video advertisements, Yahoo fantasy gaming, and Yahoo Screen – details on specific technologies have not yet been disclosed. This certainly comes at an inconvenient period for Yahoo amid reports of frantic bidding for assets from the likes of Verizon, Google, and the Daily Mail (see separate story this week). The Kudelski Group has gained quite a reputation in patent litigation…