Best Lawyers in Illinois, United States for Intellectual Property Law

For the past two decades, Mike has been assisting clients develop and defend their patent portfolios. A former Army officer and Ford Motor Company design engineer, clients appreciate Mike’s organized approach to problems and his ability to communicate with inventors across a wide swath of technologies. Mike is a full spectrum patent attorney and is himself a patentee. On the prosecution side, Mike has procured patents in nearly every art group other than bio/pharma and has an almost per...

Kevin represents his clients in all aspects of patent law, including due diligence investigations for mergers and acquisitions, patent counseling and prosecution, strategic management of patent portfolios, and opinion preparation, focusing his practice primarily on the biotechnological, pharmaceutical, and medical device industries. Kevin’s work encompasses a broad spectrum of technologies, including therapeutics such as cellular therapies, gene therapies, vaccines, large molecules (bio...

Mary Bassi is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Mary, who practices law in Chicago, Illinois, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary is held by other top lawyers in the same geographic and legal practice area.

Janet Garetto is a partner in the IP group. Her practice spans the firm’s Trademarks & Copyrights, Patents and IP Litigation practice groups. Janet counsels clients on IP issues facing their brands. In addition, she counsels clients on patent protection and litigation prevention issues with a focus on chemical and mechanical technologies. Janet also serves as the Managing Partner of Nixon Peabody’s Chicago office. What do you focus on? I focus my practice on three main areas, ...

John Gatz is a patent attorney who concentrates his practice on patent prosecution, patent counseling and patent litigation. John has extensive experience in the life sciences and manufacturing industries. My focus Patent Prosecution/Counseling I prosecute patents and counsel clients in a number of mechanical- and chemical-related technologies including: biomechanical devices, chemical products and processes, sensor-dispensing instruments, analyte meters, test sensors, non-invasive processes,...

Bill Kramer is an intellectual property attorney, focusing his practice on patent prosecution, patent threat analysis/response and intellectual property transfers. He has broad knowledge of many technical subjects, with particular experience in algorithm-based computer software, video distribution systems, cloud computing, artificial intelligence software, modern currency forms and transfers, and blockchain technologies. Bill leverages his technical aptitude and successful experience to help ...

Tom represents clients in patent and trademark prosecution, intellectual property litigation, and post-grant patent challenges before the Patent Trial and Appeal Board (PTAB). Tom has a broad base of experience in various technological and business areas, particularly in pharmaceutical, biotechnology, chemical and medical device inventions. He drafts invalidity opinions, investigates freedom to operate, counsels on strategic portfolio management, and conducts due diligence investigations prio...

Carolyn M. Passen is a top attorney recognized by Best Lawyers in the practice area(s) of Trademark Law. Carolyn M., who practices law in Chicago, Illinois, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Carolyn M. is held by other top lawyers in the same geographic and legal practice area.

Marc H. Trachtenberg is a top attorney recognized by Best Lawyers in the practice area(s) of Advertising Law and Trademark Law. Marc H., who practices law in Chicago, Illinois, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Marc H. is held by other top lawyers in the same geographic and legal practice area.

Troy A. Groetken, Shareholder Email: tgroetken@taftlaw.com Tel. (312) 775-8259 Practice Areas: Global Intellectual Property Portfolio Analysis, Counseling & Management; Complex Chemical, Small-molecule Pharmaceutical, and Biotechnological Patent Prosecution; Intellectual Property Acquisition, Divestiture, and Licensing; Clearance, Freedom to Operate & Invalidity Opinions; Trademark Prosecution; Antitrust; Intellectual Property Landscaping Education: Drake University, College of Pharma...

Floyd Mandell is the national co-chair and founder of the firm's Intellectual Property department. He has represented some of the world’s most recognizable companies in intellectual property litigation. Few other lawyers have handled as many high-profile cases over the past 20 years involving copyrights, trademarks, trade secrets, trade dress, false advertising and defamation. He has been lead counsel in more than 40 published decisions, many involving novel or cutting-edge issues. On m...

Sorinel Cimpoes is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Sorinel, who practices law in Chicago, Illinois, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sorinel is held by other top lawyers in the same geographic and legal practice area.

John Augustyn is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property and Patent Law. John, who practices law in Chicago, Illinois, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John is held by other top lawyers in the same geographic and legal practice area.

Edward A. Mas II is a Shareholder at McAndrews, and has been described by his clients and peers as a “terrifically savvy litigator” who “routinely secures the best position for his clients.” As an advocate, he is “experienced, smart, aggressive, and effective.” For more than twenty years, Ed’s trial and appellate litigation practice has focused on complex patent and technology-related litigation. He has served as lead trial counsel in numerous patent ...

Paul McAndrews is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Paul, who practices law in Chicago, Illinois, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul is held by other top lawyers in the same geographic and legal practice area.

Peter M. Siavelis is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Peter M., who practices law in Chicago, Illinois, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter M. is held by other top lawyers in the same geographic and legal practice area.