The following items belong to the embodiment of using patent information to realize indirect benefits ().

Answer: a, b, c, d

The indirect benefits achieved by using patent information mainly include: ① helping actors to effectively improve scientific decision-making; (2) Guide and support technological research and innovation; ③ Optimize and improve the business environment; ④ Identify and prevent industry risks; ⑤ Improve the quality and efficiency of patent implementation and patent operation.