Patents by Inventor Toshihiko Akatsuka

Toshihiko Akatsuka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Piezoelectric material, manufacturing method for piezoelectric material, piezoelectric element, vibration wave motor, optical equipment, and electronic device
    Patent number: 10868232
    Abstract: A piezoelectric material includes a metal oxide containing at least Ba, Ca, Ti, Zr, and Mn, in which the piezoelectric material has a perovskite structure, in which: x, which represents a ratio of a content (mol) of Ca to A (mol) representing a total content of Ba and Ca, falls within a range of 0.10?x?0.18; y, which represents a ratio of a content (mol) of Zr to B (mol) representing a total content of Ti, Zr, and Mn, falls within a range of 0.055?y?0.085; and z, which represents a ratio of a content (mol) of Mn to the B (mol), falls within a range of 0.003?z?0.012, and in which the piezoelectric material satisfies a relationship of 0?(|d31(?20u)?d31(?20d)|)/|d31(?20u)|?0.08, and has a value of 130 pm/V or more for each of |d31(?20u)| and |d31(?20d)|.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: December 15, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Saito, Akira Uebayashi, Tomohiro Watanabe, Yuto Niinuma, Yasushi Shimizu, Toshihiko Akatsuka
  • PIEZOELECTRIC MATERIAL, MANUFACTURING METHOD FOR PIEZOELECTRIC MATERIAL, PIEZOELECTRIC ELEMENT, VIBRATION WAVE MOTOR, OPTICAL EQUIPMENT, AND ELECTRONIC DEVICE
    Publication number: 20180233655
    Abstract: A piezoelectric material includes a metal oxide containing at least Ba, Ca, Ti, Zr, and Mn, in which the piezoelectric material has a perovskite structure, in which: x, which represents a ratio of a content (mol) of Ca to A (mol) representing a total content of Ba and Ca, falls within a range of 0.10x0.18; y, which represents a ratio of a content (mol) of Zr to B (mol) representing a total content of Ti, Zr, and Mn, falls within a range of 0.055?y?0.085; and z, which represents a ratio of a content (mol) of Mn to the B (mol), falls within a range of 0.003?z?0.012, and in which the piezoelectric material satisfies a relationship of 0?(|d31(31 20u)?d31(?20d)|)/|d31(?20u)|?0.08, and has a value of 130 pm/V or more for each of |d31(?20u)| and |d31(?20d)|.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Inventors: Hiroshi Saito, Akira Uebayashi, Tomohiro Watanabe, Yuto Niinuma, Yasushi Shimizu, Toshihiko Akatsuka