How do I know whether the patent I applied for has been accepted and what is the acceptance status?

"Receipt and return letter (notice of acceptance of trademark transfer application)" means that the Trademark Office sends it to the agency through the post office, or the applicant for trademark registration sends it by registered mail. Because the agency or the applicant for trademark registration has moved or no one has collected it, the post office will return the registered letter of the acceptance notice to the registration hall of the Trademark Office, and finally the agency or the applicant for trademark registration will personally go to the trademark registration hall to collect the acceptance notice. To put it bluntly, it is the admission notice. The current state is either in the hands of the agency or in the hands of the trademark registration applicant, and it is no longer in the Trademark Office.