, China Patent Network, patent.com/

and other websites have some information about patent transfer, which will contain the contact information of the patentee.

In addition, for the obligee who has no intention to transfer the patent, although the address of the obligee retrieved from the website of the Patent Office will not disclose their contact information, if you must obtain the contact information, you can register with the Beijing State Information Bureau and pay a certain fee.

there is no other way to inquire.

patent and trademark consultation helps QQ:6648369,

E-mail:hczlsb@163.com.