ABPI mourns the loss of Peter Dirk Siemsen, a key architect of intellectual property in Brazil and beyond
ABPI (Brazilian Intellectual Property Association) announces with profound sorrow the passing, this Sunday, of attorney and businessman Peter Dirk Siemsen, of the law firm Dannemann Siemsen, Bigler & Ipanema Moreira.
Widely recognized as one of the most prominent figures in Intellectual Property worldwide, Dr. Siemsen leaves an immeasurable legacy. A founding member of ABPI and its Honorary President, he played a central role in shaping the development of intellectual property law in Brazil, acting as a leading figure in its evolution over decades. He was also the only Brazilian recognized as an IP Hall of Fame Inductee, a distinction that reflects the global impact of his contributions to the field of intellectual property.
Dr. Siemsen authored numerous articles on industrial property and technology transfer in Brazil and held distinguished positions in major international organizations. He was a benefactor member and key contributor to ABAPI; Honorary Member and former President of AIPPI; Honorary Member of FICPI; former Vice-President of the Intellectual Property Commission of the ICC and ICC Regional Ambassador for Latin America; arbitrator at the WIPO Arbitration and Mediation Center; and arbitrator at the Court of Arbitration for Sport (CAS). He was also an active member of INTA, GRUR, AIPLA, ITMA, ECTA, MARQUES, LES, ATRIP, LIDC, and served on the Board of Directors of AmCham/RJ, among many other institutions.
Beyond his professional achievements, Dr. Siemsen was known for his intellectual generosity and dedication to mentoring younger generations. He maintained a strong commitment to education, professional development, and the continuous advancement of the field.
A passionate sailor, he was a Brazilian and South American champion, a veteran world champion, and also served as an international and Olympic sailing judge.
Peter Dirk Siemsen is survived by four children, to whom he was deeply devoted, as well as by family members, friends, and colleagues who now mourn his passing. His death represents a significant loss to the global intellectual property community. His legacy, however, will endure through the institutions he helped build and the ideas he helped shape.
