GENEVA, Oct. 26 -- HANGZHOU SANKOU YOUHE NIBS TECHNOLOGIES CO., LTD (Room 508, Building 1, Zhiyong Donghu Science and Technology Innovation Center, 2199 Jiangdong Avenue, Yipeng Street, Qiantang DistrictHangzhou, Zhejiang 310018), 杭州三口友和笔芯科技有限公司 (中国浙江省杭州市钱塘区义蓬街道江东大道2199号智涌东湖科创中心1幢508室) filed a patent application (PCT/CN2025/082596) for "POROUS MATERIAL-BASED PEN REFILL" on Mar 14, 2025. With publication no. WO/2025/218402, the details rel...