William Zac

Duffy

Senior Attorney
500 N. Akard Street, Suite 3800
Dallas, TX 75201-6659

Overview

Zac focuses his practice on commercial litigation and intellectual property law. He received his undergraduate degree in Management Information Systems (MIS) at the University of Oklahoma and spent several years working as a technical resource at a software company that served banks and other financial institutions. Zac counsels software companies on a number of legal issues and is active in the blockchain software community, including the North Texas Blockchain Alliance (NTBA).

Zac’s technical background has been invaluable to clients in disputes that involve some form of technology, including patent litigation and complex trade secret cases. He has handled a variety of patent litigation matters involving computer software, home security systems, video imaging, digital cameras, air purification devices, computer transaction systems, consumer products, and oil and gas exploration equipment. He has also worked with clients at each stage of the supply chain to resolve disputes about, for example, ownership of product designs or the use of proprietary manufacturing processes. 

Zac helps his clients protect their intellectual property by identifying relevant assets and then executing a strategy to protect those assets. He has filed a large number of trademark applications with the United States Patent and Trademark Office (USPTO) and has represented clients in trademark opposition proceedings brought by competitors before the Trademark Trial and Appeal Board (TTAB). Zac has also worked with clients to seize internet domain addresses registered by competitors in bad faith pursuant to the Uniform Domain Name Registration Policy (UDRP) established by the Internet Corporation for Assigned Names and Numbers (ICANN).

Education

Admissions

Achievements

  • Thomson Reuters – Texas Rising Stars (2011-2018)

Overview

Zac focuses his practice on commercial litigation and intellectual property law. He received his undergraduate degree in Management Information Systems (MIS) at the University of Oklahoma and spent several years working as a technical resource at a software company that served banks and other financial institutions. Zac counsels software companies on a number of legal issues and is active in the blockchain software community, including the North Texas Blockchain Alliance (NTBA).

Zac’s technical background has been invaluable to clients in disputes that involve some form of technology, including patent litigation and complex trade secret cases. He has handled a variety of patent litigation matters involving computer software, home security systems, video imaging, digital cameras, air purification devices, computer transaction systems, consumer products, and oil and gas exploration equipment. He has also worked with clients at each stage of the supply chain to resolve disputes about, for example, ownership of product designs or the use of proprietary manufacturing processes. 

Zac helps his clients protect their intellectual property by identifying relevant assets and then executing a strategy to protect those assets. He has filed a large number of trademark applications with the United States Patent and Trademark Office (USPTO) and has represented clients in trademark opposition proceedings brought by competitors before the Trademark Trial and Appeal Board (TTAB). Zac has also worked with clients to seize internet domain addresses registered by competitors in bad faith pursuant to the Uniform Domain Name Registration Policy (UDRP) established by the Internet Corporation for Assigned Names and Numbers (ICANN).

Experience

  • Patent Litigation

    Represented local beauty supply company in a series of cases to enforce a patented hair styling device and method and assisted them in building their portfolio of 

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  • Trade Secrets

    Won summary judgment on behalf of an executive and his new company in a case alleging he had misappropriated trade secrets and violated a covenant not to compete by

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  • Software and Tech

    Worked with expert witness to review and analyze competitor’s source code as part of dispute over the manner in which their application performed certain functions.

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