Research at Queen'sQueen’s Partnerships and Innovation is pleased to report the issuance of Canadian Patent No. 2,972,307 "Multi-Stage Multilevel DC-DC Step-Down Converter" on December 9, 2025 to Tianshu Liu and Yan-Fei Liu. The patent relates to a multi-stage, multilevel DC-DC sonverter architectures that reduce voltage stress on switches and inductors, reduce the size of the converter, increase power density, and improve efficiency.