This book is a practical guide for candidates intending to sit paper B of the European Qualifying Examination on how to respond to an office action issued by an EPO Examiner. It also provides a general introduction on the procedure up to grant of a European Patent and a detailed elaboration on how to deal with paper B of the EQE. Particularly, on the basis of the actual papers B of 2017-2019, which papers are unitary papers and no longer differentiate between the technical fields of Electricity/Mechanics and Chemistry, useful approaches and key aspects for the solving of these papers are...