Patent Search Report Video
Patent Search Video
RedBird Invalidity Video

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 patent research professionals, many of whom have JDs, Masters, and PhDs.

We understand the importance of thorough, in-depth patent research. Our veteran patent search professionals dig deep, drawing on their subject matter expertise and utilizing the best patent search strategies and technologies to efficiently uncover the patent information you need. For more information please see our Patent Search Services section below.

Patent Search Types

***All turnaround times are approximations and are subject to change.

Patent Search Report Video

Patent Search Video

RedBird Invalidity Video

Expert Patent Research Teams

Our patent 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 patent search project allowing you to get the patent results you need.

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

Our veteran patent 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 patent researchers further insight when reviewing identified documents.

Detailed Patent Search Results

With every patent search project, you receive a patent search report that lists the key references found in order of relevance. The patent search 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 patent searches and claim mapping is available upon request. Additionally, the patent search history detailing the databases, classes, and keywords used in the patent search are included in the report.

Patent Search Coverage Options

Cardinal customizes your patent 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.