Answer: A
This question examines the application and approval of patents. Option B: The rights to service inventions and creations belong to the unit; Option C: Foreigners, foreign enterprises or other foreign organizations that do not have a habitual residence or business office in China apply for patents and handle other patent affairs in China, they should entrust a person designated by the patent administration department of the State Council to The application shall be handled by a patent agency; option D is to use the postmark date as the filing date.