GENEVA, March 8 -- SIEMENS AKTIENGESELLSCHAFT (Werner-von-Siemens-StraBe 1, 80333 Munchen), 西门子股份公司 (德国慕尼黑维尔纳-冯-西门子-街1号), SIEMENS LTD., CHINA (7, Wangjing Zhonghuannan LuChaoyang District, Beijing 100102), 西门子(中国)有限公司 (中国北京市朝阳区望京中环南路7号) filed a patent application (PCT/CN2024/116036) for "METHOD AND APPARATUS FOR MAINTAINING PHYSICAL PLC BY USING VIRTUAL PLC, AND MEDIUM" on Aug 30, 2024. With publication no. WO/2026/04...