This is the term of an invention patent application. A phone call represents the first review of the notice of opinion, and the representative of returning the case reaches the examiner. A call back to the actual trial means that the patent has entered the actual trial, and the notice of examination opinions is issued for the first time. You or the patent agency will refute Patent examiners's uncreative opinion according to the result of telephone review and submit it to the Patent Office. The examiner will conduct a second trial according to your rebuttal. If the rebuttal is valid, the examiner will issue an authorization notice. If it is invalid, the examiner will issue a second notice of examination opinions, and so on. Specific operation can ask the patent agent.