Patents Assigned to Fujitec Co.
  • Seismic detector
    Patent number: 4662225
    Abstract: The disclosure is directed to an improved a seismic detector comprising: a container for containing liquid therein, liquid means being contained in the bottom of the container, a source of light for illuminating the inside of the container, a sensor means having at least one photoelectric device for transforming the light inside the container into electric signals, and a signal processor means for generating an output when the output of the sensor means exceeds a predetermined value.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: May 5, 1987
    Assignee: Fujitec Co.
    Inventors: Hiroshi Koh, Takashi Tokuyama