The European Patent Office (EPO) is one of the main players in the world of patents. Patent examiners are highly skilled knowledge workers who deal with explicit and tacit knowledge. The identification of tacit knowledge sources and the creation of knowledge through tacit to tacit knowledge sharing and tacit to explicit knowledge sharing are fundamental to the success of an organization [1]. This is in particular valid for an organization like the EPO. The development of a practical approach to share tacit knowledge in the EPO, is presented aiming at sharing experience with similar players and enhancing discussions on the practical implementation and implications of such processes in a highly efficient environment. Starting from locally driven initiatives, the European Patent Office during the last 15 years has established an internal peer to peer knowledge sharing process. This process is driven by a team of knowledge sharing experts, collated in a team called CKT – Continuous Knowledge Transfer. The process works in a complementary manner to classical and well-elaborated learning and development activities of the international organization. The success of the process is demonstrated by user statistics. Patent Examiners have to deal with a complex set of information-based procedures and associated supporting tools, all of which are continuously and rapidly evolving. Thus, patent examiners can be seen as knowledge workers par excellence, who on “non-routine” have to solve problems that require a combination of convergent, divergent and creative thinking. As a consequence as service professionals and knowledge workers patent examiners have a strong interest in effectively and efficiently managing a wide variety of knowledge sources and inputs. The knowledge sharing process established at the EPO has developed over the last 15 years to a mature state. The process is accepted by staff and management at the same time and contribution to success of the organization is significant. The EPO has a core competence in the management of technical knowledge per se contained in patent databases as well as scientific or technical prior art databases. In total these databases are closing in on one billion records. Via its CKT initiative, the EPO has developed knowledge transfer processes and corresponding IT infrastructure, going beyond this core competence. The contribution aims at presenting and critically discussing the services developed by CKT.