The Committee of Expert of the Special Union for the International Patent Classification holds its 45^th session in the International Conference Centre of Geneva from 27 February to 1 March 2013. There are issues of implementation of the Сooperative Patent Classification (CPC), clarifications as to international patent classifications (ITC) and a plan for the future cooperation between patent agencies regarding application of CPC and ITC. Work of the Ukrainian part at the meeting is provided by experts from Ukrainian patent agency and diplomats of the Permanent Mission.