IPC YYYY.MM - IT support: Master files and their by-products
This is the page for IPC files. Version control and integrity checking is possible for some of these files through their associated MD5 Key.
The file with the most recent version of these keys is available Here and its specification is available Here.
Exhaustive list of the symbols usable for the purpose of patent classification in the IPC and their associated date of introduction in the IPC or their associated version indicator ???.
List of symbols that were ever used in any version of the IPC. The second column shows the date of creation of the symbols indicated in the first column. The third column shows the of expiration date of the symbol. If the symbol is still alive, the date of expiration is displayed as "-".
List of IPC symbols referred to by IPC Definitions
List of IPC symbols referred to by each Definition of this IPC version. Each referring Definition is indicated by the symbol of the IPC Scheme where this Definition appears.
Files containing the IPC official scheme of this version, expanded with CPC subdivisions provided under the CPC official website on the first of the dates indicated in their filenames.
Files containing the IPC official scheme of this version, expanded with FI subdivisions as provided by the Japanese Patent Office on the first of the dates indicated in their filenames.