The International Patent Classification (IPC), administered by the World Intellectual Property Office (WIPO), is a hierarchical system for use in relation to the uniform classification of patents and utility models.
The main objective of the IPC is to establish an effective search tool through which users can retrieve relevant patent documents such as applications and specifications of granted patents et al. Such documents may be used, for example, to assist in the establishment of novelty and assessment of an inventive step or non-obvious element of an invention.
Moreover, the IPC also facilitates selective dissemination of relevant patent and utility model information across users of the system, and provides a basis on which statistical analysis on intellectual property and technological development can occur.
Established by the Strasbourg Agreement of 1971, the IPC contains information on patent publications from all Contracting States privy to the system, as well as most other jurisdictions, making it the most widely used patent classification system worldwide. Each patent or utility model publication is assigned one or more classification symbols which indicate the subject, or technological area, to which an invention pertains, allowing users of the IPC to efficiently distinguish details of patent publications. By utilising language-independent symbols, the classification system allows for the multi-jurisdictional use of the IPC in a uniform manner.
The classification system is split into eight alphabetised sections of subject areas for patents and utility models, namely:
A. Human necessities
B. Performing operations and transportation
C. Chemistry and metallurgy
D. Textiles and paper
E. Fixed constructions
F. Mechanical engineering, lighting, heating, weapons and blasting
G. Physics
H. Electricity
Each of these sections is then divided into classes and subclasses, as well as groups and subgroups, each possessing its own alphabetical or numerical code. The corresponding letters and numbers come together to form an overall symbol to which patent publications can be assigned, for example in the format of A01B 1/00.
The "hierarchical" element is demonstrated by the tiered format of section, class, group etc. Typically, a patent examiner will assign the classification to a patent application at the most detailed level possible in accordance with their technical content and subject matter.
The IPC is reviewed annually to reflect relevant technical developments, with the newest version being enforced on January 1st of each year. At present, the classification system is in use in over 100 countries across the globe, and divides technology into almost 80,000 areas. The IPC also details a Catchword Index, which constitutes a list of 20,000 technical key terms in relation to the appropriate classification placement, provided in both English and French, the two main languages of the system. A detailed version of the index is also provided in English and German by the German Patent and Trademark Office, which contains over 100,000 terms.
Other patent classifications are also in operation, for example, the Cooperative Patent Classification (CPC), managed jointly by the European Patent Office (EPO) and the United States Patent and Trademark Office (USPTO).
The International Patent Classification system, as well as other operational classification models used worldwide, can prove a vital tool for use in the retrieval and assessment of patent documents. If you have any questions regarding the IPC, or are interested in filing a patent or utility model application, please feel free to contact us.