Patents Assigned to Japex Geoscience Institute, Inc.
  • Multivibrator waveform monitoring system
    Patent number: 5412623
    Abstract: A multivibrator waveform monitoring system uses a plurality of seismic energy sources for giving vibrations to strata and a prospector, connected to a geophone, for measuring reflected vibrations. Each of the plurality of seismic energy sources includes a vibrator, a communication unit and a control unit for controlling the starting of the vibrator based on phase difference cancellation information and an operation starting instruction from the prospector. The prospector includes a communication unit and a synchronization control unit for controlling the synchronization of each of the seismic energy sources.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: May 2, 1995
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Masaaki Asada, Kazuo Nakai
  • Multivibrator waveform monitoring system
    Patent number: 5327399
    Abstract: A multivibrator waveform monitoring system uses a plurality of seismic energy sources for giving vibrations to strata and a prospector, connected to a geophone, for measuring reflected vibrations. Each of the plurality of seismic energy sources includes a vibrator, a communication unit and a control unit for controlling the starting of the vibrator based on phase difference cancellation information and an operation starting instruction from the prospector. The prospector includes a communication unit and a synchronization control unit for controlling the synchronization of each of the seismic energy sources.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: July 5, 1994
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Masaaki Asada, Kazuo Nakai
  • Battery unit
    Patent number: D364601
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: November 28, 1995
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Yumio Iwaki, Yoshihiro Sekino, Yoshitaka Watanabe
  • Remote station unit for geophysical data acquisition and processing system
    Patent number: D371515
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: July 9, 1996
    Assignee: Japex Geoscience Institute, Inc.
    Inventors: Yumio Iwaki, Yoshihiro Sekino, Yoshitaka Watanabe