Leonard J. Chyall

Technical

employed at Chyall Pharmaceutical Consulting, LLC

Ph.D., Chemistry — University of MinnesotaB.A., chemistry — Oberlin College
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Leonard J. Chyall is primarily a technical expert in patent litigation, most active in Life Sciences & Pharma with Pharmaceuticals / Drug Development as the leading focus area, and has appeared in fewer than ten patent matters, most recently in 2024. Chyall holds a Ph.D. and has been active since 2013.

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  • PTAB Final Written Decision outcomes
  • District court Daubert rulings
  • Representation history across parties and firms
  • Hourly rate history
  • Technology activity breakdown
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