From contested intellectual property matters before the U.S. Patent and Trademark Office to strategic counseling on patent portfolio management and licensing, Joshua Griswold advises on all aspects of IP law. He brings the unique and well-rounded perspective of a skilled practitioner with deep experience in patent procurement, enforcement, and defense.

Josh excels on all fronts, representing clients in contentious IP battles in U.S. District Courts and before the Patent Trial and Appeal Board. He has successfully handled numerous reexamination and post-grant proceedings, applying his technical savvy in arguments for his clients in infringement and validity disputes in courts across the nation. Josh also serves as the office managing principal of Fish’s Dallas office.

Clients also rely on Josh to help them develop worldwide patent portfolios. He brings a unique, litigation-informed perspective when crafting patent procurement strategies and offers sage portfolio management advice regarding excluding competitors, pursuing enforcement, and monetizing IP assets through licensing deals.

With a practice that spans the lifecycle of intellectual property, Josh helps clients understand and navigate the IP landscape as they bring new products to market, build strong patent portfolios, and divest low-value assets. When companies and IP change hands, Josh applies his extensive experience in technology assignment and licensing agreements to help his clients transform their aspirations into reality.

Josh brings firsthand experience in mechanical engineering as a former engineer who designed subsea oilfield completions and robotics. He has extraordinarily broad and deep experience in mechanical, electrical, and software innovations, including:

  • Oilfield drilling, completion, and production equipment and techniques
  • Electrical control systems
  • Wireless telemetry
  • Sensor-based controls
  • Semiconductor manufacturing
  • Enterprise software for managing business operations
  • Product and service point of sale and sales aggregation software
  • Optical character recognition
  • Energy trading

Although many of his clients are large companies, Josh enjoys working with midmarket and startup companies. He has developed a program that helps burgeoning technology companies implement systems to capture developing IP assets for patent protection and position themselves for investment and acquisition.

He is a critical member of the Fish team that designs and presents the firm’s internal training programs on patent prosecution, due diligence, licensing and agreements, and IP disputes.


"Josh Griswold understands that not every patent issue is a 'bet the company' issue and understands how to advise companies on assessing risk." — Client Testimonial, 2022 Chambers and Partners USA

Professional associations

  • American Intellectual Property Law Association
  • American Bar Association
  • Dallas Bar Association (Intellectual Property Section)
  • PTAB Bar Association, Vice Chair, Technology Committee (2020-Present)