Van de Wiele VL, Kesselheim AS, Beran D, Darrow JJ - Lancet Diabetes & Endocrinology
The number of FDA‑approved insulin products increased from 18 in 2004 to 43 in 2020, while listed patents grew from 11 to 100 over the same period. Median time to last patent expiration rose from ~16 years to ~24 years, driven largely by device‑related patents rather than new active ingredients.
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Costa E, Kesselheim AS - Journal of Law, Medicine, & Ethics
Kirby-Rivera L, Feldman WB, Kim M, Kosmopoulou G, Kesselheim AS, Tu SS - Journal of Law, Medicine, & Ethics
Eisenkraft Klein D, Kesselheim AS - Health Policy