Keiji Okamoto

6 Patents

• US123455552025

  Phase Measuring Method and Signal Processing Device

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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• US118600282024

  Vibration Detection Method with Improved Signal Processing

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US118286762023

  Optical Pulse Reflectometry and Optical Pulse Reflectometer

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US118028092023

  Backscattering Optical Amplification Device, Optical Pulse Testing Device, Backscattering Optical Amplification Method and Optical Pulse Testing Method

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US117544652023

  Optical Pulse Testing Device and Optical Pulse Testing Method

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US115986922023

  Optical Pulse Testing Method and Optical Pulse Testing Device

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites