Patents by Inventor Yoshitaka Takahashi

Yoshitaka Takahashi 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).

  • Wear-resisting sintered alloy
    Patent number: 4268309
    Abstract: Wear-resisting iron base sintered alloy obtained by sintering a metal powder composed of, by weight, 15-25% chromium, 0-3% molybdenum, 1-5% copper, 0.3-0.8% phosphorus and 2.0-4.0% carbon, with the balance iron and less than 2% impurities, to a density of more than 7.3 g/cm.sup.3.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: May 19, 1981
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Yoichi Serino, Tetsuya Suganuma, Yoshitaka Takahashi
  • Electronic sewing machine with a stitch pattern adjusting device
    Patent number: 4261271
    Abstract: A sewing machine with an electronic memory stores stitch control signals which are sequentially read out in synchronism with rotation of the upper drive shaft. Pattern selecting switches are operated to select a pattern of stitches, each stitch being produced by needle swinging amplitude and feeding amount predetermined by a selected set of stitch control signals of the memory and manually influenced stitch adjusting means to vary either the needle swinging amplitude or feeding amount for fine adjustment of the selected pattern.
    Type: Grant
    Filed: July 27, 1979
    Date of Patent: April 14, 1981
    Assignee: Janome Sewing Machine Co., Ltd.
    Inventors: Hachiro Makabe, Kazuo Watanabe, Yoshitaka Takahashi
  • Apparatus for manufacturing spherical hollow particles
    Patent number: 4021167
    Abstract: Apparatus for manufacturing spherical hollow particles which provides a large number of individual linear water jets arranged in a ring and converging at a single point, so that a molten metal may be passed through this ring of water jets and converging point.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: May 3, 1977
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Itaru Niimi, Kametaro Hashimoto, Kenji Ushitani, Masashi Shibata, Yoshitaka Takahashi
  • Anti-wear ferrous sintered alloy
    Patent number: 3977838
    Abstract: The present invention relates to an anti-wear ferrous sintered alloy composed of carbon, molybdenum, phosphorus, boron, and, if desired, copper, and the balance iron.
    Type: Grant
    Filed: June 11, 1974
    Date of Patent: August 31, 1976
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Kametaro Hashimoto, Kenji Ushitani, Masashi Shibata, Yasuo Takeda, Yoshitaka Takahashi
  • Method for manufacturing spherical hollow particles
    Patent number: 3962385
    Abstract: A method for manufacturing spherical hollow particles by providing a large number of individual linear water jets arranged in a ring and converging at a single point, and passing a molten metal through this ring of water jets and converging point.
    Type: Grant
    Filed: July 16, 1973
    Date of Patent: June 8, 1976
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Itaru Niimi, Kametaro Hashimoto, Kenji Ushitani, Masashi Shibata, Yoshitaka Takahashi