GENEVA, Nov. 30 -- SHANGHAI NORTH OCEAN TECHNOLOGIES CO., LTD (West Area Of Building 4, No.2699 Jiangshan Road, Lin-gang Special Area Of China (Shanghai) Pilot Free Trade ZonePudong New Area, Shanghai 201306), 上海鲲游科技有限公司 (中国上海市浦东新区中国（上海）自由贸易试验区临港新片区江山路2699号4号厂房西区) filed a patent application (PCT/CN2025/095623) for "MANUFACTURING METHOD FOR DIFFRACTIVE OPTICAL WAVEGUIDE" on May 19, 2025. With publication no. WO/2025/242019, t...