Ian J. Elfenbaum

Michael R. Strong is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law. Michael R., 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 Michael R. 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...

Eric S. Rein is a top attorney recognized by Best Lawyers in the practice area(s) of Bankruptcy and Creditor Debtor Rights / Insolvency and Reorganization Law and Commercial Litigation. Eric S., 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 Eric S. is held by other top lawyers in the same geographic and legal practice area.

Mark Filip, a former federal judge and high-ranking Justice Department official, helps to lead Kirkland’s government enforcement defense and internal investigations group, and serves as a member of the Firm’s Executive Committee. As a partner in the Firm’s Chicago and Washington, D.C. offices, Mark has successfully guided numerous Fortune 100 companies and financial institutions through complex mission-critical moments, counseling leaders and Boards of Directors on high-stak...

Grant H. Peters is a partner in the Chicago office of Barnes & Thornburg, a member of the Intellectual Property Department, co-chairman of the Climate Change Practice Group, a member of the Professional Responsibility Committee, and a member of the Internet and Technology Law, Advertising and Marketing, and Nanotechnology Practice Groups. Grant is an experienced attorney with a broad national and international practice focused on intellectual property development, management, protection, ...

With nearly 30 years of experience working with clients that include household brands and, in particular, mid-market businesses, John is able to remain calm and focused when encountering challenging environments. He helps clients to reduce stress in service of negotiating their desired resolution. Because copyright and trademark litigation is frequently used as a competitive tool, John works to ensure efficiency and preserve client resources throughout the litigation process, including elimin...

Samantha Maxfield Lerner is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property. Samantha Maxfield, 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 Samantha Maxfield is held by other top lawyers in the same geographic and legal practice area.

Stephen R. Auten is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property. Stephen R., who practices law in Chicago, Illinois, has been recognized since 2016. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Stephen R. is held by other top lawyers in the same geographic and legal practice area.

Christopher D. Wehrman is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Christopher D., who practices law in Bannockburn, Illinois, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Christopher D. is held by other top lawyers in the same geographic and legal practice area.

Mr. Grund is a Founding Partner with Grund & Leavitt. He practices exclusively in the area of family law concentrating in all aspects of matrimonial litigation.He has successfully represented individuals on all issues arising from divorce proceedings which involve, among other things, the valuation and disposition of substantial business interests, custody, maintenance and other marital and parental rights. Mr. Grund is known as a creative lawyer with a keen sense of the rules and the law...