Archer has acquired the full patent portfolio of defunct German eVTOL startup Lilium  for €18 million ($21 million), adding around 300 assets spanning high-voltage systems, advanced aircraft design, flight controls, ducted fans, and electric propulsion. The acquisition strengthens Archer’s intellectual property position as consolidation accelerates in the advanced air mobility sector. Founded in 2015, Lilium was once a high-profile electric aircraft company backed by Tencent