If one party entrusts another party to engage in research and completion of inventions and creations, and there is no agreement in the agreement, its patent application right ( ) shall be enjoyed.

Answer: B

Article 8 of the "Patent Law" stipulates that an invention-creation completed by two or more units or individuals in cooperation, or an invention-creation completed by one unit or individual under the entrustment of another unit or individual For inventions and creations, unless otherwise agreed, the right to apply for a patent belongs to the unit or individual who completed or jointly completed it; after the application is approved, the unit or individual who applied is the patentee.