Who invented ferrite?

Who invented magnetic core material known as ferrite?
  • Dr. Takeshi Takei from the Tokyo Institute of Technology, discovered zinc and iron oxides have special magnetic properties.
  • Professors Kato and Takei applied for a patent in Japan in 1930 for their discovery of oxide magnetic core materials which was granted in 1932.
  • Tokyo Denki Kagaku Kogyo (now known as TDK Corporation) was founded in 1935 to commercialize ferrite cores.  TDK is still making ferrite cores today.
  • Philips applied for a patent in The Netherlands in 1941 for ferrite.

Ferrite Bead


Good DX and 73, NJ2X

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