Patents by Inventor Takao Kawanuma

Takao Kawanuma 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).

  • Ultrasonic probe
    Patent number: 5050137
    Abstract: An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: September 17, 1991
    Assignees: Hitachi Construction Machinery Co., Ltd., Hitachi, Ltd.
    Inventors: Kazuo Sato, Hiroshi Kanda, Shigeo Kato, Kuninori Imai, Takeji Shiokawa, Shinji Tanaka, Isao Ishikawa, Harumasa Onozato, Hisayoshi Hashimoto, Morio Tamura, Kazuyoshi Hatano, Fujio Sato, Ken Ichiryuu, Kiyoshi Tanaka, Takao Kawanuma
  • Ultrasonic probe and manufacture method for same
    Patent number: 5003516
    Abstract: An ultrasonic probe comprising an acoustic lens (20) having a concave lens surface (21) formed on one side of a lens body, and a piezoelectric transducer (23) disposed on the other side of the acoustic lens, ultrasonic waves generated by applying voltage to the piezoelectric transducer being focused through the lens surface to detect the reflected waves of the ultrasonic waves from a sample (26) by the piezoelectric transducer for obtaining information about the surface or interior of the sample. The lens surface (21) of the acoustic lens (20) is defined by an etch profile (15) formed by etching a substrate material (11) which makes up the lens body.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: March 26, 1991
    Assignees: Hitachi Construction Machinery Co., Ltd., Hitachi, Ltd.
    Inventors: Kazuo Sato, Hiroshi Kanda, Shigeo Kato, Kuninori Imai, Takeji Shiokawa, Shinji Tanaka, Isao Ishikawa, Harumasa Onozato, Hisayoshi Hashimoto, Morio Tamura, Kazuyoshi Hatano, Fujio Sato, Ken Ichiryuu, Kiyoshi Tanaka, Takao Kawanuma