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Brian is an attorney in the firm's Lexington office, a member of the firm's Business Services Department, and Chair of the Intellectual Property Practice Group. A registered patent attorney with degrees in molecular biology (B.S.) and biochemistry (Ph.D.), Brian is a published author in the biological sciences field. His practice covers all aspects of intellectual property law, including registration and enforcement of U.S. and international patent, trademark and copyright rights.

Brian advises and assists clients with their trademark portfolios, including reviewing potential marks and selecting marks, protecting marks in the U.S. and around the world, and enforcing marks. Brian has prepared and prosecuted patents in a wide range of fields, including surfactants, nanoparticles, medical devices, sports equipment and computer systems. Brian also assists clients in the higher education, boutique consumer goods, life sciences, tobacco, hemp, and other fields with licensing and acquiring intellectual property and negotiating relationships with their contractual partners. 

Brian also serves as outside counsel for the Game Manufacturers Association, the trade organization for the tabletop gaming industry, and regularly advises game designers, developers, and publishers on intellectual property matters.

Career Highlights


  • Selected as an Up and Coming attorney in Chambers USA: America’s Leading Lawyers for Business, 2019
  • Selected for inclusion in the Kentucky Super Lawyers® "Kentucky Rising Stars" list, 2013-2018
  • Leadership Lexington, Class of 2016


Professional Affiliations

  • Kentucky Bar Association
  • Louisville Bar Association, Intellectual Property Section Chair 2012
  • Fayette County Bar Association
  • International Trademark Association

Community Involvement

Professional Leadership

  • Registered Patent Attorney, 2008, Reg. No. 59,253
  • Editor, University of Kentucky College of Law Journal of Natural Resources and Environmental Law
  • Registered Patent Agent, 2006

Civic and Charitable Involvement

  • Founded the Dr. Brian and Dr. Veronique Chellgren Scholarship for Auerbach School of Occupational Therapy Students at Spalding University
  • Honorable Order of Kentucky Colonels
  • Volunteer, Church of the Savior, Nicholasville, Kentucky


Contributions & Published Works

  • "Will new ‘first inventor to file’ patent system affect businesses?" Business First of Louisville, May 17, 2013
  • "Is your product properly marked under U.S. patent law?" Business First of Louisville, May 20, 2011
  • "Speed of Science," Co-author, Medical News eNewsletter, June 2010
  • "The Cures Acceleration Network: A Hidden Gem Within the Patient Protection and Affordable Care Act," ABA Health eSource, Co-author, May 2010, Vol. 6, Issue. 9
  • "Are Children Playing on Your Website?" Greenebaum Doll & McDonald PLLC Law Letter, Co-author, Issue 3, 2009
  • "Top 10 Intellectual Property Myths," St. Matthews Area Business Association, Co-author, October 2008
  • "Keeping An Eye on Your IP," Greenebaum Doll & McDonald PLLC Law Letter, Issue 4, 2008
  • "Unfolded Proteins: From Denatured to Intrinsically Disordered," Contributor, edited by Trevor P. Creamer, Nova Science Publisher, 2008
  • "Evidence for Polyproline II Helical Structure in Short Polyglutamine Tracts," Chellgren BW, Miller AF, Creamer TP, J. Mol. Biol., 361(2):362-71, August 11, 2006
  • "Side-Chain Entropy Effects on Protein Secondary Structure Formation," Chellgren BW, Creamer TP, Proteins, 62(2):411-20, February 1, 2006
  • "Oligoproline Effects on Polyglutamine Conformation and Aggregation," Bhattacharyya A, Thakur AK, Chellgren VM, Thiagarajan G, Williams AD, Chellgren BW, Creamer TP, Wetzel R, J. Mol. Biol., 355(3):524-35, January 20, 2006
  • "Urea Promotes Polyproline II Helix Formation: Implications for Protein Denatured States," Whittington SJ, Chellgren BW, Hermann VM, Creamer TP, Biochemistry, 44(16):6269-75, April 26, 2005
  • "Effects of H20 and D20 on Polyproline II Helical Structure," Chellgren BW, Creamer TP, J. Am. Chem. Soc., 126(45:14735-5, November 17, 2004
  • "Short Sequences of Non-Proline Residues Can Adopt the Polyproline II Helical Conformation," Chellgren BW, Creamer TP, Biochemistry, 43(19):5864-9, May 18, 2004
  • "Host-Guest Study of Left-Handed Polyproline II Helix Formation," Kelly MA, Chellgren BW, Rucker AL, Troutman JM, Fried MG, Miller AF, Creamer TP,Biochemistry, 40(48):14376-83, December 4, 2001



  • “Intellectual Property Protection for Computer Game Designers,” 2018 Vector Conference, Eastern Kentucky University, Richmond, Kentucky, April 21, 2018
  • “Intellectual Property Protection for Game Designers and Game Publishers,” 2018 Game Manufacturers Association (GAMA) Trade Show, Reno, Nevada, March 16, 2018
  • “Legal Issues: Licenses and Publishing Agreements,” 2018 Game Manufacturers Association (GAMA) Trade Show, Reno, Nevada, March 16, 2018
  • “Intellectual Property Protection for Game Designers,” 2017 Game Manufacturers Association (GAMA) Trade Show, Las Vegas, Nevada, March 13, 2017
  • “Intellectual Property Protection for Game Designers,” 2016 Game Manufacturers Association (GAMA) Trade Show, Las Vegas, Nevada, March 14, 2016
  • “So You Want to Be A Gaming Mogul? Practical Tips for New Gaming Designers and Companies,” 2016 Game Manufacturers Association (GAMA) Trade Show, Las Vegas, Nevada, March 14, 2016
  • “So You Want to Be A Gaming Mogul? Corporate and Intellectual Property Considerations for Game Designers and Companies,” 2015 Game Manufacturers Association (GAMA) Trade Show, Las Vegas, Nevada, March 16, 2015
  • “Intellectual Property Issues for Computer Hardware, Software and Networks,” Bellarmine University, Louisville, Kentucky, 6, 2012
  • Moderator, “Patent Law Update,” Louisville Bar Association, 2012
  • “Inequitable Conduct: Therasense and Beyond,” Louisville Bar Association, 2012
  • “Intellectual Property Issues for IT Product Design and Reverse Engineering,” Bellarmine University, Louisville, Kentucky, 27, 2011
  • “Patent Reform Act,“ Louisville Bar Association, 2011
  • Speaker, The Caring Generation, a weekly radio program hosted on 630 KHOW AM (Denver, CO), Sept. 12, 2010
  • "Patent Law Update," Louisville Bar Association, 2010 Speaker, 18th Annual Gibbs Conference on Biothermodynamics, Carbondale, Illinois, 2004



Vanderbilt University, B.S., Molecular Biology, cum laude, 2000
University of Kentucky College of Law, J.D., 2008
University of Kentucky College of Medicine, Ph.D., Biochemistry, 2005

  • Kentucky, 2008
    U.S. Patent and Trademark Office, 2008
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