Katherine Del Rosario

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...

Daniel Schwartz is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Patent. Daniel, 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 Daniel is held by other top lawyers in the same geographic and legal practice area.

A skilled negotiator and litigator, partner Michael F. Koenigsberger focuses his practice on family law- related matters. Recognized as one of Chicago’s leading lawyers in family law, he has represented hundreds of clients in complex custody and financial issues, prenuptial agreements, paternity cases and domestic relations. Particularly adept at dealing with high-asset, complex cases, Michael takes pride in working with clients through all phases of the issues they face, from litigatin...

Jay Augustyn is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Jay, 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 Jay is held by other top lawyers in the same geographic and legal practice area.

Julie Seymour represents and counsels banks and borrowers, including hospitals, health systems, educational and cultural institutions and long-term care providers; governmental issuers; underwriters; and trustees in connection with tax-exempt and taxable financings. Since 1990, Julie has been involved in billions of dollars of tax-exempt bond financings, including fixed and variable rate structures, as well as secured and unsecured lending transactions. What do you focus on? In my finance pra...

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

Thomas J. Wimbiscus, a shareholder with McAndrews, has more than thirty years of experience and practices in all areas of intellectual property litigation, with a special emphasis on patent and trademark litigation. He has appeared in over 100 litigations and over 100 inter partes reviews (IPRs). He was named one of the 10 most active IPR practitioners in the U.S. for patent owners. (Patexia 2018.) Tom was named as one of the world’s leading patent professionals by IAM Patent 1000 in 20...

Josh provides strategic legal counsel to corporate and individual clients on critical business matters that include complex corporate transactions including mergers and acquisitions, venture capital/growth equity transactions, corporate structuring and governance issues, employee equity and non-compete agreements, joint ventures and private securities placements. He works with them to analyze their transactions and operations from every angle – planning, negotiation, documentation, impl...

Jim represents corporate and individual clients in antitrust and white collar crime defense matters and related commercial litigation matters in federal and state courts throughout the United States and before a variety of federal and state investigative agencies, including the Antitrust Division, United States Department of Justice, the Federal Trade Commission, United States Attorney’s Offices and the Securities and Exchange Commission. In the antitrust area, Jim focuses on litigating...

Raymond Lyons is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Insurance. Raymond, 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 Raymond is held by other top lawyers in the same geographic and legal practice area.