human: Are there other patent classification systems?
assistant: There are two important classification systems maintained by some of the largest patent offices, namely the European Patent Office (EPO), the United States Patent and Trademark Office (USPTO) and the Japan Patent Office (JPO), i.e. the EPO and USPTO joint Cooperative Patent Classification ( CPC ) system and the Japanese FI system; both of the two systems are based on the IPC. Using the CPC , a user can carry out a high precision search in the patent documentation classified by the use of this classification system. Using FI/F-term , a user can carry out a high precision search in the Japanese documentation. However, the IPC is used universally all over the world, which enables a user to search, for example, both US and JP documents, or documents published by many other countries using no other classification system than the IPC. Online viewer of both CPC and FI/F-term has been integrated in the IPC Official Publication where they can be displayed in the context of the IPC scheme.