Which platform is the largest for patent trading?

The largest platform for patent trading is as follows:

1. China Patent Network is an authoritative platform for patent transfer and exhibition, providing services such as patent transfer and release, patent technology exhibition, patent technology transfer and enterprise high-tech certification.

2. China Patent Information Network. China Patent Information Center, established in 1989, is a large national patent information service institution directly under China National Intellectual Property Administration, and has the right to manage and use the patent database authorized by China National Intellectual Property Administration.

3. China Intellectual Property Network. China Intellectual Property Network is a professional website in the field of intellectual property, dedicated to building a comprehensive online interactive platform integrating news, products and services.