RPSA - Intellectual Property Law

San Antonio's only 
Intellectual Property 
Strategic Portfolio Development and Management Law Firm

Who We Are!


The Intellectual Property Group (referenced as “RPSA-IP”) is a division of the San Antonio law firm of Rosenthal Pauerstein Sandoloski Agather, LLP, which was founded in 2006 by a group of seasoned attorneys dedicated to meeting the legal needs of rapidly growing businesses and active entrepreneurs.  Leveraging the talents of four San Antonio patent and trademark attorneys with experienced paralegal support, RPSA-IP has tremendous experience in every facet of patent preparation and prosecution.  

Led by Texas veteran portfolio strategist Will Quirk, the team also includes partners Alan Thiele and Daniel Rogers.  With the combined experience of well more than 100 years of writing, prosecuting and managing patent portfolios (both in-house and out-house) for Texans and San Antonio residents, the RPSA-IP team is gifted at developing portfolios that maximize business value while minimizing costs. 

Accomplished Patent and Trademark Professionals.  


All RPSA-IP attorneys are recognized by their peers as being among the brightest and most accomplished attorneys practicing intellectual property law in San Antonio.  While all our attorneys routinely advise clients on strategic portfolio development, Alan Thiele and Will Quirk have focused their careers on value maximization and strategic direction for patent portfolio management.  

Although few clients want to be involved in litigation, all our attorneys also have the added depth of perspective that comes from having successfully enforced intellectual property assets, as well as from having successfully defended clients and their businesses against third party intellectual property claims.  

In addition to patent protection, RPSA-IP attorneys are experienced in developing, registering and enforcing trademarks and copyrights.   In our trademark and copyright practice we have the focused skills to protect and promote our clients’ goodwill and brand identity.  

William H. Quirk


  • William H. Quirk, Partner25 years experience writing, prosecuting, enforcing and managing patent portfolios, including 18 years as chief in-house counsel over all intellectual property affairs. 
  • Education:  
    • Texas A&M, BS, mechanical engineering.  
    • St. Mary’s University Law School, JD
  • Will developed the intellectual property portfolio for San Antonio based KCI on a relatively tiny budget.  His in-house tenure as Associate General Counsel culminated in a portfolio of more than 1,000 IP assets that protected annual revenues exceeding $1B and provided a foundation for settlements totaling more than $100M from competitors.  He then served as General  Counsel for a technology developer before reducing its operations and joining RPSA in 2008.  His practice encompasses a wide variety of technologies including software, hardware, business methods, wireless telecom, and medical devices.  
  • 2012 Best of San Antonio Lawyers - S.A. Scene.
  • Member of the San Antonio Intellectual Property Association.

Daniel A. Rogers


  • Experienced in Intellectual Property law since 2004.
  • Former web developer for Silicon Valley high-tech group; super geek.
  • Major focus: computer science, software design and development, and engineering.
  • Education:     
    • Brigham Young University, BA History; Minor chemistry and physics.
    • Boston University Law School, JD, Intellectual Property with Honors.
  • Mr. Rogers has assisted multiple companies with protecting their intellectual property.  In addition to having a chemistry and physics background, he has experience in computer sciences, electrical engineering and computer software design and development.  He also handles an extensive trademark portfolio for his many clients.  Mr. Rogers handles many intellectual property litigation matters for both plaintiffs and defendants.
  • Licenses
    • USPTO
    • Texas state bar
    • Utah state bar
  • Three Time Guinness World Record Holder.
  • MENSA member.
  • 2012 Best of San Antonio Lawyers - S.A. Scene.
  • 2013 Best of San Antonio Lawyers - S.A. Scene.
  • Member of the San Antonio Intellectual Property Association.

Jesse Frizzell


  • Jesse Frizzell, AttorneyJesse Frizzell is an intellectual property attorney whose practice is focused on patent prosecution involving mechanical, pharmaceutical, and software products. 
  • He also has experience with prosecuting trademarks, drafting licensing and research agreements, and business formation procedures in Texas.  
  • His previous experience includes working in wildlife rehabilitation and the educational industry.
  • Education:     
    • Bachelor of Science in Biology, cum laude, University of Texas at San Antonio.
    • Juris Doctor, cum laude, St. Mary’s University School of Law.
      • Senior Associate Editor, St. Mary’s University Law Journal
  • Licenses
    • USPTO
    • Texas state bar
  • San Antonio Bar Association member.

Janis Deitz


  • Janis Deitz, ParalegalJanis Deitz joined our Intellectual Property Group in 2009 as a paralegal, and has been working in intellectual property law since 2002.  
  • She is primarily involved in patent and trademark prosecution along with copyright registrations.
  • Prior to entering the intellectual property field, she had experience in a variety of industries working in marketing/sales, accounting, human resources and insurance.
  • Volunteer with Habitat for Humanity, Angle Tree and Children’s Shelter








Jeff Roussin


  • Jeff Roussin, ParalegalJeff Roussin is a paralegal in our Intellectual Property practice group. 
  • He has spent over 15 years in intellectual property with the previous eight years in the trademark practice group at AT&T, Inc.
  • Paralegal Certificate, Texas Careers