Patents by Inventor Isao Hayasaka

Isao Hayasaka 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).

  • Method of manufacturing a resistor having a low temperature coefficient
    Patent number: 3979823
    Abstract: A resistor with a low temperature coefficient comprises, by way of example, a main wire wound resistor having a low temperature coefficient on the order of -4.0 PPM and a resistance on the order of 1 K.OMEGA. connected in series with an auxiliary resistor having a temperature coefficient the magnitude of which is substantially greater than that of the main resistor and the polarity of which is opposite to that of the latter, for example, on the order of 4000 PPM and having a resistance which is greatly reduced as compared with that of the main resistor, for example, on the order of 1.OMEGA.. The composite resistor has a resistance of approximately 1 K.OMEGA. and a temperature coefficient which is less than 0.5 PPM.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: September 14, 1976
    Assignee: Takeda Riken Kogyo Kabushiki Kaisha
    Inventor: Isao Hayasaka
  • Resistor with low temperature coefficient
    Patent number: 3970983
    Abstract: A resistor with a low temperature coefficient comprises, by way of example, a main wire wound resistor having a low temperature coefficient on the order of -4.0 PPM and a resistance on the order of 1 K.OMEGA. connected in series with an auxiliary resistor having a temperature coefficient the magnitude of which is substantially greater than that of the main resistor and the polarity of which is opposite to that of the latter, for example, on the order of 4000 PPM and having a resistance which is greatly reduced as compared with that of the main resistor, for example, on the order of 1.OMEGA.. The composite resistor has a resistance of approximately 1 K.OMEGA. and a temperature coefficient which is less than 0.5 PPM.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: July 20, 1976
    Assignee: Takeda Riken Kogyo Kabushiki Kaisha
    Inventor: Isao Hayasaka