You’d think that a greener, hybrid version of London’s famous black cabs would be a good thing for the traffic-choked British capital—and you’d be right. Unless, that is, you’re the current manufacturer of the iconic taxi, in which case you’d do anything to block competition. That’s exactly what has happened in London, where the London Taxi Company claimed that the new hybrid Metrocab had infringed on trademarks covering the taxi’s design. However, a high court…