The ipc classification number of the third-class patent adopts the form of grade, indicating the technical content: department, division, class, subclass, large group and group, and gradually forming a complete classification system. According to the international classification of a product, it is easy to retrieve the patent information in the technical field of the product.
Ipc classification number structure:
The structure of the international patent classification system is as follows: the international patent classification system sets categories according to technical topics, and divides the whole technical field into five different levels: department, large category, small category, large group and small group.
For example:
Department: b- operational transportation.
Category: B64- refers to aircraft, aviation and spacecraft. Category numbers of categories are marked with two digits.
Subclass: B64C- indicates flying. The class number of the small class is marked with capital letters.
Group B 64C 25/00-Indicating landing gear. The group number is marked as 1-3 digits plus /00.
Group: B64C 25/02-. The sign is to change 00 in the large group /00 to other numbers. The scores in the group decrease in turn, but they can't be seen from the classification number, and can only be judged according to the points in front of the small category.
Refer to the above? Baidu Encyclopedia-International Patent Classification Table (IPC Classification)