GENEVA, Sept. 19 -- SHENZHEN HONGKANG ENVIRONMENTAL TECHNOLOGY CO., LTD. (Room 302, Building E, Tongfang Information Port, No. 11 Langshan Road, Songpingshan Community, Xili Street, Nanshan DistrictShenzhen, Guangdong 518000), 深圳市宏康环境科技有限公司 (中国广东省深圳市南山区西丽街道松坪山社区松坪山朗山路11号同方信息港E座302) filed a patent application (PCT/CN2024/084626) for "PORTABLE NEGATIVE OXYGEN ION GENERATION APPARATUS" on Mar 29, 2024. With publication no. WO/2...