Christopher R. Lewis
Shareholder | Valley Forge, PA
P: (610) 993-4238
F: (610) 407-0701
Although Chris Lewis handles all aspects of intellectual property (IP) law, he has become particularly experienced in intellectual property due diligence; drafting and negotiating IP-related agreements, especially technology licenses; patent prosecution (especially of chemical patents); and opinions assessing infringement and validity. In particular, Mr. Lewis is responsible for RatnerPrestia's work in obtaining patents for clients whose products include catalytic converters, fuel cells, and pharmaceutical products, among others. He has issued a wide range of opinions in a variety of technical areas, from infringement opinions of a single patent to opinions assessing validity, infringement and other issues of an entire patent portfolio of competitors of clients. Mr. Lewis has aided clients in assessing target companies' intellectual property prior to an acquisition. Mr. Lewis has drafted, negotiated, reviewed, or counseled clients on a range of agreements, including Patent Licenses, Trade Secret Licenses, Hybrid Licenses, Joint Development Agreements, Acquisition Agreements, Assignments, Confidentiality Agreements, Distributorship Agreements, and Supply Agreements.
In representing the firm's clients, Mr. Lewis recognizes that a law firm is part of the service industry, and he strives to provide prompt and quality service to the firm's clients. In addition, Mr. Lewis encourages providing seminars to a company's research and development team or other groups to strengthen the company's intellectual property portfolio. He has provided seminars on a wide range of topics, including the basics of patent law including the America Invents Act, intellectual property due diligence, and issues affecting IP-related agreements, such as technology licenses.
After earning a B.S. in Chemical Engineering from the University of Delaware, Mr. Lewis enrolled in Villanova University School of Law, where he received a Juris Doctor degree in 1991 and whom he represented in the Giles S. Rich Moot Court Competition. He has served as Chair of the Philadelphia Chapter of the Licensing Executives Society (LES) and has spoken at LES meetings on intellectual property due diligence.
Mr. Lewis conducted an intellectual property overview entitled, "Intellectual Property Primer", at the First Annual Delaware Valley Corporate Counsel Association (DELVACCA) Paralegal/Legal Assistant Institute.  He has been honored as a "Pennsylvania Super Lawyer" in the area of Intellectual Property Law.
Mr. Lewis is Chair of the Firm's BioChemPharma Group.
Practice Expertise Bio(s)

Articles & Presentations

Bar Admissions
  • Pennsylvania
  • United States District Court for the Eastern District of Pennsylvania  
  • United States Patent and Trademark Office

  • J.D., Villanova University School of Law (1991)
  • B.S., Chemical Engineering, University of Delaware

  • Philadelphia Intellectual Property Law Association
  • Pennsylvania Biotechnology Association
  • Speaker and author on various IP topics, including:
    • Speaker, Tools for Strategic IP Practice, Legal Intelligencer CLE
    • Speaker, IP Due Diligence and Patent Reexaminations, Association of Corporate Counsel Delaware Valley (DELVACCA) Chapter’s Second Annual In-House Counsel Conference
    • Speaker, IP Issues That Can Blindside Corporate Counsel, DELVACCA's First Annual In-House Counsel Conference
  • Author, A Paradigm Shift in Obviousness for Pharma, Biotech, IP Law360
  • Licensing Executives Society
    • Former Chair of the Philadelphia Chapter


  • The Best Lawyers in America©, 2014 - Present 
    • Patent Law
  • Pennsylvania Super Lawyer, 2004-2006
    • Intellectual Property

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