Nathan Cassell

Patent Attorney

Background and Experience

Nathan’s practice focuses on patents for medical, mechanical, chemical, electronic, and computer-based device and method inventions.  He has deep expertise in patent prosecution and intellectual property counseling in the biomedical, biotech, medical device, biochemical, bioscience, physiology, biosurgery, bioengineering, microfluidic, diagnostic, and mechanical arts.  He prepares opinion letters and performs patent portfolio evaluations and due diligence reviews of entities working in the biomedical, health care, and mechanical fields.  Nathan also provides scientific and prosecution advice in dispute matters, including validity and infringement analysis.

Nathan practiced from 2006 to 2018 in the Denver, Colorado office of Kilpatrick Townsend & Stockton, a premier international law firm.  Prior to that, he worked from 1998 to 2005 in the Palo Alto, California office of Townsend and Townsend and Crew, which was the largest intellectual property firm in the Western United States at the time.

Representative Matters

  • Representation of vision treatment system innovator through three successive acquisitions, culminating in acquisition by Fortune 100 multinational medical device company.
  • Representation of world leading innovator in allograft technology.
  • Representation of occlusion recanalization catheter designer through acquisition by leading medical technology company.
  • Representation of venture-backed, privately held commercial stage renal therapy start-up through acquisition by NASDAQ-listed global medical device company.
  • Representation of privately held surgical ablation device developer through acquisition by leading atrial fibrillation medical device provider.
  • Representation of Fortune 500 health care company during development and enforcement of biosurgery patent portfolio.
  • Representation of biomedical diagnostics company through acquisition by global science and technology innovator.
  • Representation of specialty pharmaceutical company with proprietary drug delivery platform.
  • Representation of CPR device start-up company through acquisition by NASDAQ-listed medical device company.
  • Representation of world leading manufacturer of microfluidic devices.

Education

Nathan obtained a Bachelor of Science in Biomedical Engineering from Northwestern University in 1988, and a Juris Doctor degree from the University of Denver College of Law in 1994.  He has also taken graduate coursework in microbiology at Western Michigan University, and continuing education coursework in bioinformatics at the University of California Santa Cruz Silicon Valley Extension.

Pro Bono

Nathan volunteers as a mediator for Jefferson County Mediation Services in Golden, Colorado.  He also volunteers as a Guardian ad Litem for the Rocky Mountain Children’s Law Center in Denver, Colorado.

Professional Qualifications

Nathan has been a registered patent attorney since 1998, and has been licensed to practice in the state of Colorado since 1995.