A patent search can be conducted by anyone, but it is typically done by patent attorneys, patent agents, or patent search professionals. These individuals have experience and training in searching patent databases and can provide comprehensive search results that can be used to determine the patentability of an invention or to evaluate the strength of an existing patent.
In addition, the United States Patent and Trademark Office (USPTO) provides a free online patent search database called the Patent Full-Text and Image Database (PatFT) that can be accessed by anyone. The PatFT database allows users to search and view the full text and images of patents issued from 1976 to the present. The USPTO also provides other online patent databases and resources that can be used to conduct patent searches.
It is important to note that while patent searches can provide valuable information about the patentability and strength of an invention or patent, they can also be complex and time-consuming. It is recommended that individuals seeking to conduct a patent search consult with a registered patent attorney or agent who can provide guidance and assistance in navigating the patent search process.