Our manual patentability search is conducted in records of the U.S. Patent Office, European Patent Office and the World Intellectual Property Organization. It is a true international search involving the identification of appropriate U.S. and International class codes, extensive research, integrity checks and document selection. Our report includes a written patentability opinion supported by copies of all relevant patent references selected. You should be aware that a U.S. patent application may be rejected by prior U.S. as well as foreign patents.