Dr. Takeshi Takei, the professor at the Tokyo Institute of Technology, discovered that composite oxides containing zinc and iron have distinguished magnetic properties. In 1930, Prof. Takei submitted a paper on his work to Japanese Electro-chemical Society and also presented a paper at 57th General Meeting of American Electrochemical Society in St. Louis. That same year, Prof. Takei applied a patent for his discovery, which was granted in 1932(Japan PAT-98844). Tokyo Denki Kagaku Kogyo (now TDK Corporation) was founded in 1935 to commercialize this newly invented ferrite cores.
Society: IEEEMain Category: ElectricEra: 1930-1939DateCreated: 1930-1945Tokyo Institute of TechnologyNikahoCountry: JapanWebsite: http://www.ieeeghn.org/wiki/index.php/Milestones:Development_of_Ferrite_Materials_and_Their_Applications,_1930-1945Creator: Takei, Takeshi
YearAdded:Image Credit: Courtesy Tokyo Institute of TechnologyEra_date_from: 1930