Among non-registrable designations the Russian Trade Mark Law operative until January 1 2008 (and possibly the laws of the other countries) mentions the official names and images of exceptionally valuable cultural heritage objects of the Russian Federation. In this regard it is interesting to study a recent decision of the Chamber of Patent Disputes of the Russian PTO. The case concerns the cancellation of the Russian word trade mark Baikal, registration number 297,460. Baikal is a lake in Siberia characterized by exceptional natural properties. It is a unique ecological system and a UNESCO world natural heritage site. UNESCO has a catalogue of the World Cultural Heritage and also issued Operational Guidelines for the Implementation of the World Heritage Convention.