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Peter J. McAndrews


Peter J. McAndrews practices in all areas of intellectual property and complex technology law. He has been involved in all aspects of patent litigation, acquisition and counseling, involving a broad spectrum of electrical, biomedical and mechanical technologies. He has litigated patent disputes involving wired and wireless networks, cardiac pacemakers and defibrillators, thermal hand-held labelers and printers, digital television distribution systems, ophthalmic surgery systems, pneumatic actuators, paper-making machinery, cellular and IP telephony, fiber optics, Internet applications and computer software. He has also litigated trademark, trade dress and unfair competition issues.

Ranging from ultrasound medical equipment to semiconductors, Peter has managed the development of significant global patent portfolios, and has prepared and prosecuted numerous patent applications for inventions in many diverse fields. He advises clients regarding patent infringement/non-infringement and validity/invalidity for both utility and design patents. He also performs due diligence investigations for the acquisition of multi-million dollar companies.

In addition to his IP practice, Peter has represented a number of individual chiropractors, as well as some of the leading national chiropractic associations. This representation has involved such diverse issues as contract disputes, antitrust violations, injunction enforcement, Medicare laws and administrative procedure. At times, it has also included litigation against federal agencies, medical associations and insurance companies.

Areas of Practice


Bar Admissions / Registrations

  • District Court for the Northern District of Illinois
  • U.S. Court of Appeals for the Federal Circuit
  • U.S. Patent and Trademark Office


  • The John Marshall Law School, J.D., cum laude
  • University of Notre Dame Law School/London Centre for International Legal Studies
  • Marquette University, B.S., Electrical Engineering