U disk belongs to Class 42 trademark Class 42 scientific and technological services and related research and design services; industrial analysis and research; design and development of computer hardware and software;

(The following is the process of trademark registration)

1. Trademark search files are handled by the Archives Department of the Trademark Office.

2. When the public security, courts, procuratorates, national security, disciplinary inspection and supervision, auditing agencies and other departments inquire about trademark files, the inquiry personnel should present their valid certificates and submit relevant official letters.

3. If a law firm or trademark agency is entrusted by a party to inquire about the party's own trademark files, the inquiry personnel should present their valid certificates and submit the party's power of attorney, the party's valid identity certificate and legal affairs A letter of introduction from the law firm or trademark agency.

4. Law firms or trademark agencies acting as agents for litigation activities can query the archives of the trademark involved. The querying personnel should present their valid certificates and submit relevant certificates from the court, the parties’ power of attorney, and legal affairs A letter of introduction from the law firm or trademark agency.

5. If a trademark registrant inquires about his own trademark file, the inquiry personnel should present his valid certificate. If the registrant is an organization, he should submit a letter of introduction from the organization and a copy of the business license stamped with the official seal.

6. If a law firm or trademark agency and a trademark registrant need to obtain trademark files for document appraisal, in addition to the above procedures, the appraiser should also submit an introduction from the appraisal agency.