Patents by Inventor Masafumi Yamakawa

Masafumi Yamakawa 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).

  • BRIDGESTONE CORPORATION
    Publication number: 20090269044
    Abstract: Provided is a small-sized in-line heater which is also capable of rapid heating. This in-line heater includes a ceramic heater, and two piping blocks each including a lid member and a piping block body in which a flow pipe is formed. The piping blocks are disposed to face each other with the ceramic heater interposed in between.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 29, 2009
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Masafumi Yamakawa
  • Ceramic heater unit
    Publication number: 20070138161
    Abstract: A ceramic heater unit having at least a heater and electrodes for passing electricity through above heater to elevate the temperature of the heater, characterized in that above heater and above electrodes are respectively made of a material containing silicon carbide, and above heater and above electrodes are integrally constructed with use of a binder made of a material containing silicon carbide.
    Type: Application
    Filed: December 1, 2004
    Publication date: June 21, 2007
    Inventor: Masafumi Yamakawa
  • Brushless motor
    Patent number: 4866324
    Abstract: The present invention relates to a brushless motor which utilizes part of the motor housing, which is formed by a plastic mixed with particles or fibers of a magnetic material, as a stator yoke.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: September 12, 1989
    Assignees: Canon Kabushiki Kaisha, Canon Seki Kabushiki Kaisha
    Inventors: Suezo Yuzawa, Masafumi Yamakawa, Takao Shibayama