You can conduct the patent search on the website of the USPO or on the European Patent Office’s database. However, since patent research is a subject that requires expertise, it is recommended that this patent research be carried out by a professional patent attorney.
Before applying for a patent, patent application documents must be prepared well. Preparation of patent application documents is a task that requires expertise. Considering that every word to be used will significantly affect the scope of protection of the application, it is very important to seek help from a professional patent attorney (preferably an engineer of patent origin).
Patent research is a research conducted by official institutions for the invention that is the subject of a patent application. The patent applicant must request a patent search within 15 months from the date of filing the patent application. As a result of this patent research, the closest documents in the prior art related to the subject of the invention are determined and a patent search report (Patent Search Report) is prepared as you can read from https://midhudsonnews.com/2020/05/10/how-does-inventhelp-support-new-inventors/.
The patent research report sheds light on the extent to which the patent application meets the patentability criteria. As specific to US, after a patent search report, the patent applicant must examine the patent system or as patent examination system recognized the right to choose one of two systems.
After the patent research report that comes as a result of the patent research, the applicant does not request a patent examination and can choose the patent system without examination. In this case, the patent applicant is given an un-examined patent document providing 7 years of protection. The owner of the Patent Examination Certificate without examination can turn the patent without examination into the patented patent by requesting a patent examination before the 7-year period expires as explained on https://vocal.media/journal/innovating-as-a-small-business article.
A patent review is an examination by government agencies for the invention that is the subject of a patent application. The patent applicant should request a patent review after the patent research report is obtained. Patent review is the comparison of the invention subject to patent application and the closest patent documents specified in the patent research report. As a result of this patent examination report, it is decided whether to issue a patent document with examination. The Examined Patent Registration Document provides the patent applicant with 20 years of patent protection.