About Leydig Voit & Mayer, Ltd

As a firm that has been at the forefront of intellectual property law for more than a century, Leydig, Voit & Mayer has helped shape the IP landscape. With clients in fields ranging from pharmaceuticals and biotechnology to consumer household goods and financial services, the firm specializes in patent, trademark and copyright litigation, registration and prosecution, unfair competition, franchising and licensing.

No Intellectual Property Lite Here

Leydig, Voit & Mayer was founded in 1893 in Rockford Illinois by attorney Luther Miller, who filed his first patent application just after he was admitted to the Illinois Bar. A few years later, Miller moved his growing firm to the Windy City. By the middle of the next century, Leydig attorneys made an appearance before the feared nine, where they argued a patent infringement lawsuit using the "doctrine of equivalents." In the 1970s, the firm was also involved in the industry-wide spat over whether Miller Brewing Company could prohibit other brewers from using the words "lite" or "light" in their lower calorie brews. Since Miller's first patent application, the U.S. has issued millions more patents, and Leydig has stayed in the IP game.

Since then, Leydig, Voit & Mayer has grown to an outfit with more than 80 attorneys and offices in Washington, California, Washington, DC and Germany. From its roots as a Chi-town IP boutique, Leydig, Voit & Mayer has become one of the most active trademark firms in the U.S. Leyvig attorneys have handled IP issues for clients like aerospace manufacturer Barber-Colman Company, Microsoft, the National Institutes of Health, Mitsubishi Electric Corporation, Agfa Gevaert NV, Aetna, Cabot Corporation, Discover Financial Services, Johns Hopkins University, Cornell University, Caterpillar Inc. and the American Express Company. All this action attracts attention--Corporate Counsel Magazine has identified the firm as one of the ten "most wanted" IP firms among America's biggest companies.

Just IP It

Like other technically-minded intellectual property firms, Leydig, Voit & Mayer is not for those who fear polysyllabic words. Attorneys at the firm specialize in a variety of technologies, including mechanics, electronics, chemistry, computer software and genetics, enabling them to delve into matters like hybridoma and monoclonal antibody technologies, semiconductor polishing compositions and combinatorial chemistry. But not everything Leydig attorneys do is such a mouthful--recently three of the firm's lawyers helped Nike establish that its slogan, "Just Do It," had become a "famous" trademark.

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Leydig Voit & Mayer, Ltd

Two Prudential Plaza
Suite 4900
Chicago, IL 60601
Phone: (312) 616-5600
Fax: (312) 616-5700


  • Employer Type: Private
  • President: Michael Hartmann
  • Total No. Attorneys 2014: 89

  • Base Salary
    1st year: $140,000

  • Major Departments & Practices
    Business Methods
    Electrical, Computer and Software Technologies
    Intellectual Property Transactions
    Mechanical Technologies
    Pharmaceutical & Chemical Technologies
    Trade Secrets & Unfair Competition
    Trademarks & Copyrights

Major Office Locations

  • Chicago, IL (HQ)
  • Rockford, IL
  • Seattle, WA
  • San Francisco, CA
  • Washington, DC
  • Frankfurt
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