TY - GEN A1 - Chao, Chen-Xiang A1 - Krüger, David T1 - Stegzahnrad Y1 - 2022 UR - https://opus4.kobv.de/opus4-UBICO/frontdoor/index/index/docId/29656 UR - https://patents.google.com/patent/DE102019211451A1/de?inventor=Chen-Xiang+Chao ER -