Patents by Inventor Tadamichi Koike

Tadamichi Koike 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).

  • Protective device and communication device
    Patent number: 6690283
    Abstract: An apparatus to indicate a state where a communication device connected to a communication wire and a power line is protected from a surge current. A toroidal coil picks up a rapid increase of current caused by a rapid increase of voltage that occurs in the communication wire and/or the power line. The toroidal coil is connected to the current detecting unit. The current detecting unit converts the current from the toroidal coil into a voltage and supplies it to a switching circuit. The switching circuit turns on an indicator light circuit to light up an LED of the indicator light circuit.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: February 10, 2004
    Assignees: Sony Corporation, Nakayo Telecommunications, Inc.
    Inventors: Fujio Nemoto, Waichi Horiuchi, Tadamichi Koike
  • Protective device and communication device
    Publication number: 20020048134
    Abstract: The present invention is to inform a state where a communication device connected to a communication wire and a power line is protected from a surge current. The toroidal coil picks up a rapid increase of current caused by a rapid increase of voltage which occurs in the communication wire and/or the power line, to supply the current from the toroidal coil to the current detecting unit. The current detecting unit converts the current from the toroidal coil into a voltage and supplies it to a switching circuit. The switching circuit turns on the indicator light circuit to light up the LED of the indicator light circuit.
    Type: Application
    Filed: August 3, 2001
    Publication date: April 25, 2002
    Inventors: Fujio Nemoto, Waichi Horiuchi, Tadamichi Koike