The legal protection period of invention patent right is 20 years, and the legal protection period of utility model patent right and design patent right is 10 year. Option b is incorrect. If it is approved as a patent after legal review procedures, but the patent needs to go through the review procedures stipulated by other laws and regulations to play its role, it cannot be recognized as a patent asset, and option C is incorrect; The scope of patent assets is determined by the claim, and option D is incorrect.