Photo of Denise L. Mayfield

Denise L. Mayfield Member

Areas of Practice


Bar Admissions

  • Colorado
  • Texas
  • District of Columbia
  • U.S. Patent and Trademark Office

Court Admissions

  • U.S. District Court, Western District of Texas
  • U.S. Court of Appeals, Federal Circuit
  • U.S. Supreme Court


St. Mary's University School of Law, J.D.

University of Texas at San Antonio, M.S.

  • Genetics and Physiology

Trinity University, B.A.

  • Biology


Denise Mayfield is a certified licensing professional, and routinely drafts, negotiates, and strategizes between multiple parties to provide her client’s with the most advantageous licensing and combination business-focused agreements designed to achieve their business needs. Her experience includes licensing strategies involving intellectual property assets (patents, trademarks, copyright, trade secret), real estate, ongoing business operations (hospitality (restaurant, bar) services), medical devices, beer, whisky, and other branded and unbranded products and future products in development. Denise provides specialized expertise in patent matters related to plant genetics, plant biochemistry, chemical synthesis, aquaculture, organic synthesis chemistry, medical devices, genotyping, and DNA sequencing subject matter areas. Specific types of related, ancillary agreements she has drafted include license-back agreements, product and/or service outsourcing agreements, distribution agreements, joint-development agreements and technology transfer agreements (University, Private entity, Start-up business).

Denise brings sophisticated scientific, commercial and legal experience combining patent, health care, pharma, biotech and software/AI advances to protect client assets.

Denise’s strong science background (with an advanced degree in genetics and physiology, and years of experience as a medical researcher) together with her legal training, brings strategic and technically focused legal services to her clients. A skilled and experienced patent attorney, she assists domestic and international clients in identifying, protecting, licensing and litigating bet-the-company technologies.

Denise works closely with internal corporate and university technology transfer professionals in patent portfolio development and prosecution, product commercialization strategies, technology transfer and regulatory compliance resolution. She represents companies directly in negotiating technology licenses, cooperative research agreements, joint venture agreements, international distribution and marketing programs, patent litigation matters and university pooling arrangements. Her gift for understanding the business needs of the client permits her to create the strongest protection strategy for her clients.

Denise partners with clients to protect a wide range of products and methods, including genetic testing, disease detection and screening tools, veterinary medicine, vaccines, orthopedic devices, dental devices, chemical purification and extraction techniques, plant products, and cannabis and hemp products and their preparation, as well as extraction/purification methods.

Denise counsels clients on matters such as pharmacophore drug modeling and selection, antibody and stem cell technologies, regenerative medicine and stem cell technology, disease-screening methods and bio-signature development and disease detection. She also handles IP matters related to medical devices (spine, shoulder, knee), DEA-regulated research, controlled substances (anabolic steroids, cannabinoids) and Bayh-Dole compliance and iEdison reporting.

Denise negotiates global and regional licenses that drive revenues while allowing clients to retain ownership of intellectual property assets. She has worked in all aspects of the technology transfer process assisting and drafting license agreements, option agreements, and other transactional documents concerning pharmaceuticals (human and veterinary), medical devices, biologics, and health care monitoring wearable technologies. In developing comprehensive licensing strategies for emerging and larger technology companies, Denise takes into account the unique business pressures each group faces. She also has significant experience helping clients divest assets they no longer wish to pursue. 

Denise is a registered patent attorney, admitted to practice before the U.S. Patent and Trademark Office. She works closely with clients to maximize an effective path to market, especially for products, methods and systems related to technologies requiring the experienced handling of FDA regulatory compliance issues and trade secret and/or patented technologies. Denise is admitted to practice in Washington, D.C., Texas, and Colorado, and frequently assists clients in navigating and resolving governmental agency-related and state-compliant issues.


Medical Devices
Extensive experience assisting clients in the protection and management of intellectual property assets associated with diverse medical device portfolios, including:

  • Implantable devices for repair of shoulder, spine and knee
  • Suture anchors (soft anchors, knotless and knotted; hard body anchors)
  • Soft tissue repair systems
  • Hard-body anchors
  • Bone drill sets
  • Shoulder, rotator cuff replacement devices
  • Orthopedic screws and pins (hip)
  • Surgical adhesive materials,
  • Sterilized human tissue allografts
  • PTFE grafts
  • Biologically engineered surgical materials (bone putty/bone slurry’s (demineralized), collagen matrix materials, skin tissue gels, tissue adhesives)
  • Wound repair materials (tissue skin graft materials (sheets), wound repair and healing preparations, drug-releasing wound repair materials)
  • Hemostatic and blood collection materials and devices (specialty blood collection devices, blood loss calibrating devices, blood anti-coagulant coated devices, anti- coagulant formulations, treated blood collection bags)
  • Artificial tissue fabrication methods and processed harvested donor tissue fabrication
  • Human tissue sterilization techniques and devices for performing human tissue sterilization suitable for human implantation in compliance with FDA requirements
  • Human amniotic membrane preparations
  • Placenta tissue derived tissue patch
  • Medical device coatings (polymer, anti-bacterial, drug release)
  • Stem cell and implantable device systems for rapid bone and tissue healing/regeneration, bone replacement and bone regenerating materials and methods
  • In vivo cranial bone regeneration materials and methods
  • FDA compliant testing of laboratory procedures for sterilizing tissue grafts from human donor materials (infectious agent testing and compliance study compliance)

FDA-Related Experience:

  • Identified and analyzed patents included in Paragraph IV Certification statements in Abbreviated New Drug Applications (ANDA)
  • Assisted clients in developing Phase I, Phase II and Phase III protocols/materials and in meetings with Food and Drug Administration (FDA) officials
  • Obtained FDA 510(k) clearance for adult stem cell therapeutic methods, stem cell products and processes for producing stem cell related products
  • Reviewed clients' website materials to remove/edit representations concerning potentially FDA-regulated activity
  • Advised on physician/clinic client’s exemption for “off label” use and “practice of medicine” exemption of products
  • Advised numerous clients during FDA on-site inspection visits
  • Assisted with therapeutic biological products clearance within FDA’s Drug Evaluation and Research (CDER) office
  • Advised multiple clients on FDA labeling/branding requirements and misbranding of products, drug or devise under the FDCA, “Rx only” labeling

Additional Experience:

  • Developed proprietary and non-proprietary product and business services commodity pipelines for biologics divisions/spin-offs of large domestic and foreign companies, including Samsung Biologics
  • Prepared and coordinated the creation of strategic international and domestic patent portfolios in client/corporate target markets
  • Developed international patent and proprietary information licensing strategies to facilitate new product launches
  • Developed and secured compliant and coordinated branding (trademark) strategies for domestic and/or international product launches
  • Negotiated client services agreements and created client materials for providers/manufacturers (quality/specification of materials received, return/refund provisions, suitability for specific commercial uses)
  • Reviewed and developed effective compliant product inserts (FDA, branding) and product packaging
  • Developed suitable product delivery protocols for perishable and/or limited shelf-life product delivery to consumers/purchasers
  • Developed appropriate delivery protocols of perishable materials (biological tissues, sensitive biological reagents, etc.)
  • Handled import/export of numerous perishable and/or border-regulated materials

Human Genetics Patents:

  • 10,087,489 Biomarkers and uses thereof in prognosis and treatment strategies for right-side colon cancer disease and left-side colon cancer disease
  • 10,087,463 Methods and compositions for transposition using minimal segments of the eukaryotic transformation vector piggyBac
  • 9,956,263 Composition for improving skin conditions comprising a fragment of human heat shock protein 90A as an active ingredient
  • 9,580,756 Stratification of left-side and right-side colon cancer
  • 9,721,067 Accelerated progression relapse test
  • 9,598,460 Antibody purification via affinity chromatography
  • 9,464,328 Biomarkers and uses thereof in prognosis and treatment strategies for right-side colon cancer disease and left-side colon cancer disease
  • 9,357,755 Production of human glycosylated proteins in silk worm
  • 9,283,266 Metastasis inhibition preparations and methods
  • 9,220,770 Extracellular matrix materials as vaccine adjuvants for diseases associated with infectious pathogens or toxins
  • 9,157,909 Male reproductive health panel and uses thereof
  • 9,125,858 Compositions and methods relating to resveratrol
  • 9,006,393 Molecular constructs and uses thereof in ribosomal translational events
  • 8,992,214 Orthodontic self-ligating brackets
  • 8,846,059 Extracellular matrix adjuvant and methods for prevention and/or inhibition of ovarian tumors and ovarian cancer
  • 8,802,113 Extracellular matrix cancer vaccine adjuvant
  • 8,778,362 Anti-tumor/cancer heterologous acellular collagenous preparations and uses thereof
  • 8,778,360 Extracellular matrix cancer vaccine adjuvant
  • 8,637,265 Cathepsin E as a marker of colon cancer
  • 8,597,885 Accelerated progression relapse test
  • 8,512,754 Stabilized products, processes and devices for preparing the same
  • 8,491,947 Paeoniflorin preparations and uses thereof for fat reduction
  • 8,293,088 Direct determination of carbohydrates, amino acids and antibiotics by microchip electrophoresis with pulsed amperometric detection
  • 8,257,715 Tissue vaccines and uses thereof
  • 8,062,646 Tissue vaccines and uses thereof
  • 8,013,022 Stabilized products, process and devices for preparing same
  • 7,943,187 Paeoniflorin preparations and uses thereof for fat reduction
  • 7,932,088 High efficiency transformation of Plasmodium falciparum by the lepidopteran transposon, piggyBac
  • 7,892,750 Cathepsin E as a marker of colon cancer
  • 7,790,677 Insulin production methods and pro-insulin constructs
  • 7,968,324 Helicobacter system and uses thereof
  • 7,632,678 Cancer stem cells and uses thereof
  • 7,534,857 Methods and compositions for the treatment and prevention of staphylococcal infections
  • 7,494,767 Assay for TSG101 as inhibitors of HIV production
  • 7,105,343 Methods and compositions for transposition using minimal segments of the eukaryotic transformation vector Piggybac
  • 6,962,810 Methods and compositions for transposition using minimal segments of the eukaryotic transformation vector piggyBac
  • 6,492,104 EIA test using non-denatured HIV Antigen for Early Detection of HIV Infection
  • 6,136,530 Compositions and methods for assessing risk factors in Alzheimer's disease
  • 5,994,108 Mutant TAR virus and transdominant tat mutants as pharmacological agents
  • 5,919,621 Methods for diagnosing human male infertility
  • 5,856,103 Method for selectively ranking sequences for antisense targeting
  • 5,831,061 Nucleic acid encoding ecdvsis-triggering hormone
  • 5,763,400 Ecdvsis-triggering hormone compositions
  • 5,466,676 Satellite cell proliferation in adult skeletal muscle
  • 10,174,382 Breast cancer prognostication and screening kits and methods of using same
  • 2018/0160713 Methods Of Screening
  • 2017/0241971 Phosphorothioate Dnazyme Complexes And Use Thereof
  • 2016/0333413 Breast Cancer Prognostication And Screening Kits And Methods Of Using Same
  • 2016/0039907 Protein Folding And Methods Of Using Same
  • 2017/0333524 Molecular Constructs And Uses Thereof
  • 2017/0247766 Late ER+ Breast Cancer Onset Assessment And Treatment Selection
  • 2010/0186099 Production Of Human Glycosylated Proteins In Silk Worm
  • 2017/0035860 Compositions and methods for treatment of neurogenerative diseases
  • PCT/US2016/29874 Scalable Production Of Standardized Extracellular Vesicles, Extracellular Vesicle Preparations And Uses Thereof
  • PCT/US2007/005072 Piggybac Constructs In Vertebrates
  • PCT/US2015/041625 Molecular Constructs And Uses Thereof
  • PCT/US2016/032913 Triple Negative Breast Cancer Screen And Methods Of Using Same In Patient Treatment Selection And Risk Management
  • PCT/US2015/047052 Late ER+Breast Cancer Onset Assessment And Treatment Selection
  • PCT/US2016/58519 A Picometer-Diameter Pore In An Inorganic Membrane For Sequencing Protein
  • PCT/US2017/031624 Prognosis Biomarkers And Anti-Tumor Compositions Of Targeted Therapeutic Treatments For Triple Negative Breast Cancer
  • 20080146492 Insulin production methods and pro-insulin constructs
  • 20160289291 Lis-Pro Proinsulin Compositions And Methods Of Producing Lis-Pro Insulin Analogs Therefrom
  • 20160030520 Aspart Proinsulin Compositions And Methods Of Producing Aspart Insulin Analogs
  • 20160024168 Aspart Proinsulin Compositions And Methods Of Producing Aspart Insulin Analogs Therefrom
  • 20120214963 Liquid Insulin Compositions And Methods Of Making The Same
  • 20120214965 Lis-Pro Proinsulin Compositions And Methods Of Producing Lis-Pro Insulin Analogs Therefrom
  • 20120214199 Insulin Production Methods And Pro-Insulin Constructs
  • WO 2017070692 A Picometer-Diameter Pore In An Inorganic Membrane For Sequencing Protein
  • WO 2019/209831 A1 Clinician/Patent Data Input and Monitoring Systems and Methods

Community/Civic Activities

Women in Bio, Founding Chair

Greater Austin Hispanic Chamber of Commerce, Diplomatic Delegation Member to Mexico 2019, International Committee, Vice Chair

Association of University Technology Managers (AUTM), 2019 Annual Convention Planning Committee

Notre Dame Club of Austin

Mexi-Arte, 2018 Catrina Ball Steering Committee