Can I pay the annual patent fee myself, or can I transfer (transfer) the patent myself? Do you need a charge d 'affaires? The application is handled by an agency.

See how the contract between you and the agency is agreed. You can do it yourself or entrust an agency to handle it. Of course, the intermediary will charge a certain service fee. However, it is not worry to save money yourself, especially the annual fee is easy to forget. Once a listed company forgot to pay the annual fee and lost its intellectual property rights in vain. In addition, if there is an error in the agency, resulting in the invalidation of the patent right due to non-payment, the agency can also make compensation according to the contract.