GENEVA, Feb. 4 -- TOSHIBA MATERIALS CO., LTD. (8, Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa2350032), 東芝マテリアル株式会社 (神奈川県横浜市磯子区新杉田町８番地), KABUSHIKI KAISHA TOSHIBA (1-1, Shibaura 1-chome, Minato-ku, Tokyo1050023), 株式会社　東芝 (東京都港区芝浦一丁目１番１号) filed a patent application (PCT/JP2024/025584) for "SILICON NITRIDE SINTERED COMPACT, TOOL FOR FRICTION STIR WELDING, AND METHOD FOR MANUFACTURING TOOL FOR FRICTION S...