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Meet Our Professionals

Timothy D. St. Clair

Partner
Greenville | 864.577.6371
Fax | 864.242.9888

Tim St. Clair helps clients solve complex patent and other intellectual property problems with practical judgment shaped by unusual breadth of experience. Most patent lawyers are either litigators or prosecutors. Tim has built his practice doing both, along with substantial opinion work. That combination gives him a disciplined, real-world perspective on intellectual property: he helps clients focus on what matters, tune out patent lawyer noise, and address disputes and strategy questions with the right level of urgency, investment, and precision.

Tim’s practice spans patents, trademarks, copyrights, and trade secrets, with a particular focus on patent and trademark disputes, patent prosecution, freedom-to-operate analyses, infringement and validity issues, and intellectual property due diligence. Because he works across disputes, filings, and opinions, he brings a perspective that many IP lawyers do not. His litigation experience sharpens his counseling, and his prosecution and opinion work make him a more effective advocate when disputes arise. Clients rely on him not only to protect and enforce intellectual property rights but also to assess risk clearly, identify leverage, and develop practical strategies aligned with broader business objectives.

Clients also turn to Tim for courtroom credibility. He has handled dozens of patent and trademark cases, along with substantial copyright and trade secret disputes, in jurisdictions across the country. Before concentrating his practice in intellectual property, Tim spent the first 17 years of his career in insurance defense litigation, where he was regularly on his feet in courtrooms, tried jury cases, and learned to manage the competing pressures that shape real-world litigation strategy. That experience continues to influence how he practices today: with a clear eye for risk, efficiency, leverage, and commercial practicality. He is also often trusted by other lawyers to step into significant IP disputes when seasoned judgment is required.

In addition to litigation, Tim represents clients in building, protecting, and evaluating intellectual property portfolios in the United States and internationally. He advises on patent and trademark strategy, freedom-to-operate and infringement questions, and due diligence involving IP assets. His approach is grounded in clear communication, careful analysis, and practical recommendations appropriately sized to the problem at hand. Whether he is pursuing protection, evaluating exposure, or managing a dispute, Tim’s focus remains the same: helping clients make sound decisions that protect value, reduce unnecessary risk, and support long-term business goals.

As a certified mediator focused on intellectual property disputes, Tim brings practical credibility that comes from doing the work himself. He understands the legal issues, the realities of litigation, and the business pressures that often drive resolution. That perspective allows him to approach mediation not as an abstract process but as a practical effort to test positions realistically, narrow the true points of disagreement, and help parties reach sensible outcomes in difficult cases. His experience across litigation, prosecution, and opinion work also gives him a broader understanding of how IP disputes are evaluated from multiple angles, which can be especially valuable in resolving hard-fought disputes.

Tim also uses advanced technology, including AI tools, in a disciplined manner to improve efficiency, strengthen analysis, and help clients reach better-informed outcomes.

Representative Experience

Patent Litigation

  • Represented power tool manufacturer in patent case; successfully negotiated advantageous settlement after discovering patent marking failure by patent owner.
  • Represented recreation equipment manufacturer in patent and trademark case; secured a consent injunction for willful patent infringements and other remedies on the eve of trial after two years of litigation.
  • Represented a multinational company accused of patent infringement and secured a positive resolution after discovery uncovered flaws in the plaintiffs' case.
  • Defended an innovative client accused of patent infringement in which the plaintiff voluntarily dismissed the case after two years of litigation to avoid risking a ruling on summary judgment.
  • Represented a plaintiff against a patent infringer and achieved beneficial settlement terms despite claims of patent invalidity.
  • Secured summary judgment of patent infringement and patent claim validity against a copycat competitor.

Trademark Disputes

  • Successfully defended a client accused of trademark infringement for using Google ad words registered as federal trademarks. Through the settlement, the client was able to keep using the desired ad words.
  • Defended a client against a claim to cancel a federal registration. The case was settled in favorable terms for the client after three years of litigation.
  • Represented a client against a former employee who took website data and passwords. After quickly initiating litigation, the client recovered all relevant content, including domain control and login credentials.

Copyright Litigation

  • Pursued printed apparel copyright case and secured settlement on favorable terms.
  • Defended a business accused of copyright infringement and, after extensive discovery, helped reach a favorable settlement before trial.

Misappropriation of Identity

  • Defended a client sued by a celebrity based on radio advertisements. The case was settled for nominal damages.

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Honors & Awards

  • The Best Lawyers in America in Trademark Law, Patent Law, Patent Litigation, Intellectual Property Litigation, 2011-2026; Trade Secrets Law, 2016-2026
  • The Best Lawyers in America "Lawyer of the Year" in Greenville for Intellectual Property Litigation, 2013, 2020, 2024; Trademark Law, 2016, 2024; Patent Law, 2014, 2017, 2021, 2023
  • Managing Intellectual Property magazine's IP Stars
  • Greenville Business Magazine's "Legal Elite" in Intellectual Property & Innovation, 2015, 2018-2020, 2022-2023; International Law, 2020
  • South Carolina Super Lawyers, 2012-2024
  • Benchmark Litigation, Local Litigation Star in South Carolina, 2011-2013

Memberships

  • American Bar Association, Litigation Section, 2006-2013; Subcommittee of IP Litigation Committee, Co-Chair, 2008-2013; Accelerated Examination Subcommittee of IP Section, Chair, 2008-2009
  • Carolina Patent, Trademark and Copyright Law Association, Secretary and Board Member, 2007-2010
  • JDRF, International Board of Directors, 2013-2016; Development Committee, 2009-2016; National Ride Committee, 2006-present, Chair, 2009-2011; IP Advisory Task Force, 2010; National Head Coach "Ride to Cure Diabetes," 2007-2011
  • Greenville Spinners Bicycle Club, Board of Directors, 2006-2012; President, 2008
  • Greenville Spinners Bicycle Safety Foundation, Chair, 2010-2012