Katsuhiko Hirabayashi

3 Patents

• US119888732024

  End Structure of a Waveguide

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US119601522024

  Method for Adjusting Transmitted Wavelength of Signal Light Transmitted Through Optical Waveguide Device

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites
• US118357682023

  Filling Resin and Optical Waveguide Circuit Filled with Filling Resin

  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

  0 cites