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Patent Search Services

Cardinal is the leading intellectual property services company in the United States. Our clients include Fortune 500 companies, law firms, and educational institutions.

Cardinal has been contracted by the U.S. Patent and Trademark Office since 2006 to conduct their PCT searches and prepare the preliminary opinions across all subject categories. We have an experienced team of over 150 U.S.-based research professionals, many of whom have JDs, Masters, and PhDs.

Search Types

Patent Search Video

RedBird Invalidity Video

Expert Research Teams

Our research teams are custom-assembled, based on the technology of the requested research. Each team in led by a project manager, who is a patent attorney* with the requisite subject matter expertise. The project manager acts as a valuable liaison before, during, and after each search project allowing you to get the results you need.

Please click here for a listing of technologies Cardinal has experience searching.

Our veteran search professionals include patent attorneys*, patent agents, and former patent examiners, all with extensive technical knowledge. They utilize sophisticated search strategies for each project, accounting for individual features and combinations using multiple classifications, subclasses, keywords, and synonyms. In addition, they are all well-versed in the concepts of anticipation and obviousness, which gives our researchers further insight when reviewing identified documents.

Detailed Search Results

With every search project, you receive a report that lists the key references found in order of relevance. The report is available via our secure online interface and is also sent as a PDF so you can access it from anywhere at any time. Citations to important portions of the references are provided in most searches and claim mapping is available upon request. Additionally, the search history detailing the databases, classes, and keywords used in the search are included in the report.

Coverage Options

Cardinal customizes your search scope and has the ability to search over 100 patent issuing authorities including U.S. patents and published applications and foreign patents and published applications (many of which are full text via machine translation). Foreign-language specialists may be added to a project team to perform research on the full text of non-English documents.

For a listing of our foreign language capabilities please click here.

Cardinal also has access to over 1000 non-patent literature databases that contain over 550,000,000 subscribed to articles, from journals, magazines, news wires, technical standards, conference proceedings and company filings.

For a listing of our patent and non-patent literature resources please click here.