GENEVA, July 28 -- BEIJING POSITIVE AND NEGATIVE PRESSURE TECHNOLOGY DEVELOPMENT CO., LTD. (201, 2nd Floor, Building 1, Nongguang Nanli,Chaoyang District, Beijing 100020), 北京正负压科技发展有限公司 (中国北京市朝阳区农光南里1号楼2层201) filed a patent application (PCT/CN2024/124840) for "MICROENVIRONMENT FRESH-KEEPING REFRIGERATOR" on Oct 15, 2024. With publication no. WO/2025/152522, the details related to the patent application was published on Jul 24, 2025.
Notably, the patent application was submitted under the International Patent Classification (IPC) system, which is m...