Professionals

William Logan

Partner

Overview
Experience
Credentials
Insights & News

William Logan is a trial lawyer and advisor who represents technology companies in high‑stakes civil disputes, with a particular emphasis on patent and trade secrets matters. A former software developer and electrical engineer, William brings uncommon technical fluency to complex litigation, translating sophisticated technical concepts into clear, persuasive courtroom narratives. He regularly litigates in the nation’s most active venues, including the Eastern and Western Districts of Texas, before the Patent Trial and Appeal Board, and at the Federal Circuit.

Clients rely on William to manage critical matters from pre‑litigation strategy through trial. His practice spans a broad range of technologies, including semiconductors, wireless communications, digital infrastructure, virtualization software, unconventional oil and gas development and completions technologies. He is frequently called upon by companies seeking to protect foundational innovations or defend against aggressive enforcement campaigns.

William has demonstrated an ability to apply pressure and succeed for his clients at every phase of litigation. Recently, William was part of a Winston team that won jury verdicts of infringement and validity in a competitor lawsuit in the Western District of Texas, after he revealed through cross examination that the infringer’s primary defense of prior use was premised on an abandoned and defunct product. William likewise recently obtained a case-dispositive claim construction for the defense in the Eastern District of Texas that forced the plaintiff to stipulate non-infringement and ended an ongoing campaign against financial institutions regarding online banking security. And over the last several years, he has obtained dismissals on the pleadings for patent ineligibility in venues across the country, ending several meritless patent infringement campaigns at their inception.

For these efforts, William was named among the top 50 patent litigation attorneys in 2025 & 2026 by Patexia and is consistently recognized in Best Lawyers: Ones to Watch® in America.

Beyond litigation, William is actively engaged in the development of intellectual property law and policy in the United States and internationally. He serves as a Global Fellow of the Federal Circuit Bar Association, participates in advanced study of intellectual property law and policy through the Naples Roundtable, and is a Barrister of the Honorable Nancy F. Atlas Intellectual Property American Inn of Court.

In addition to his intellectual property practice, William handles high‑profile civil litigation. He recently led a Winston team that earned an Am Law “Litigator of the Week” recognition for successfully defending the medical privacy rights of 30 patients against the Texas Attorney General. The matter involved proceedings in nearly a dozen district courts and culminated in William delivering a decisive argument before Texas’s Fifteenth Court of Appeals that established new precedent and fully vindicated the patients’ rights.

Key Matters

Defended a large financial institution against a patent infringement suit brought in the Western District of Texas (Waco) related to targeted advertising. The infringement allegations were aggressively contested and defended, including filing early summary judgment motions. The plaintiff agreed to a walk-away, stipulated to a covenant not to sue, and dismissed the case with prejudice.
Represented a large oilfield services company in asserting its patent rights over unconventional oil and gas production operations against multiple infringing competitors, culminating in a win at jury trial against one competitor in the Southern District of Texas (Houston).
Secured attorney fees, sanctions, and a pre-suit injunction in the Western District of Texas (Waco) against a notorious filer of nuisance patent litigation on behalf of a large network technology company, ending a pattern of meritless litigation.
Obtained dismissal on the pleadings on behalf of an enterprise software company in a dispute over automated mainframe operating system installations in the Southern District of Texas (Houston).
Won a case-dispositive claim construction for a large financial institution in the Eastern District of Texas, which ultimately forced the plaintiff to stipulate to noninfringement.
Secured dismissal on the pleadings on behalf of a large network technology company in the Northern District of California in a dispute involving network access security.
Won a bench trial in the Western District of Texas (Waco) that vindicated a telecommunications companies’ patent assertion rights and defeated an infringer’s claims of inequitable conduct.
Obtained a decisive victory on a behalf of a large oilfield services company after argument before the Patent Trial and Appeal Board that vindicated key claims and patents for protecting its inventions related to innovative fracturing operations.
Successfully defended a large financial institution against a patent infringement suit brought in the Northern District of Texas related to mobile banking technology. After winning a favorable claim construction ruling and motions to strike the plaintiff’s post claim construction infringement theories, the plaintiff agreed to a stipulated dismissal of the case and final judgment in favor of Winston’s client in order to seek an appeal. The Federal Circuit affirmed, providing a decisive win for Winston’s client.
Vindicated the medical privacy rights of 30 patients against subpoenas from the Texas Attorney general in a case that spanned nearly a dozen Texas counties and culminated in a decisive argument before Texas’s Fifteenth Court of Appeals that set new precedent and vindicated the patients’ rights. Read more.
Won dismissal on the pleadings on behalf of an enterprise cybersecurity company in the District of Delaware after demonstrating that the asserted claims, which were directed to detecting suspicious communications, were patent ineligible.
Secured advantageous resolution after obtaining favorable claim-construction rulings in the Western District of Texas (Waco) for a virtualization company in litigation involving ten patents involving cloud computing and hardware and network virtualization techniques.

Capabilities

Appellate & Critical Motions

Intellectual Property

ITC – Section 337

Labor & Employment

Patent Litigation

Privacy & Data Security

Public Companies

Trademark Litigation, Prosecution & Brand Protection

Trade Secrets, Non Competes & Restrictive Covenants

Automotive & Mobility

Oil & Gas

Technology, Media & Telecommunications

Digital Infrastructure

Key Matters

Defended a large financial institution against a patent infringement suit brought in the Western District of Texas (Waco) related to targeted advertising. The infringement allegations were aggressively contested and defended, including filing early summary judgment motions. The plaintiff agreed to a walk-away, stipulated to a covenant not to sue, and dismissed the case with prejudice.
Represented a large oilfield services company in asserting its patent rights over unconventional oil and gas production operations against multiple infringing competitors, culminating in a win at jury trial against one competitor in the Southern District of Texas (Houston).
Secured attorney fees, sanctions, and a pre-suit injunction in the Western District of Texas (Waco) against a notorious filer of nuisance patent litigation on behalf of a large network technology company, ending a pattern of meritless litigation.
Obtained dismissal on the pleadings on behalf of an enterprise software company in a dispute over automated mainframe operating system installations in the Southern District of Texas (Houston).
Won a case-dispositive claim construction for a large financial institution in the Eastern District of Texas, which ultimately forced the plaintiff to stipulate to noninfringement.
Secured dismissal on the pleadings on behalf of a large network technology company in the Northern District of California in a dispute involving network access security.
Won a bench trial in the Western District of Texas (Waco) that vindicated a telecommunications companies’ patent assertion rights and defeated an infringer’s claims of inequitable conduct.
Obtained a decisive victory on a behalf of a large oilfield services company after argument before the Patent Trial and Appeal Board that vindicated key claims and patents for protecting its inventions related to innovative fracturing operations.
Successfully defended a large financial institution against a patent infringement suit brought in the Northern District of Texas related to mobile banking technology. After winning a favorable claim construction ruling and motions to strike the plaintiff’s post claim construction infringement theories, the plaintiff agreed to a stipulated dismissal of the case and final judgment in favor of Winston’s client in order to seek an appeal. The Federal Circuit affirmed, providing a decisive win for Winston’s client.
Vindicated the medical privacy rights of 30 patients against subpoenas from the Texas Attorney general in a case that spanned nearly a dozen Texas counties and culminated in a decisive argument before Texas’s Fifteenth Court of Appeals that set new precedent and vindicated the patients’ rights. Read more.
Won dismissal on the pleadings on behalf of an enterprise cybersecurity company in the District of Delaware after demonstrating that the asserted claims, which were directed to detecting suspicious communications, were patent ineligible.
Secured advantageous resolution after obtaining favorable claim-construction rulings in the Western District of Texas (Waco) for a virtualization company in litigation involving ten patents involving cloud computing and hardware and network virtualization techniques.