Patents by Inventor Takatsugu Yuasa

Takatsugu Yuasa 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).

  • Temperature controller and array waveguide lattice type optical wavelength multiplexer/demultiplexer
    Publication number: 20040202421
    Abstract: In a temperature control device which maintains an object to be controlled at a preset constant temperature and an arrayed waveguide grating optical wavelength multiplexer/demultiplexer, the adverse effect of the junction temperature of the semiconductor control element is eliminated for the purpose of simplifying the overall structure and improving operation efficiency sufficiently without any trouble.
    Type: Application
    Filed: February 2, 2004
    Publication date: October 14, 2004
    Inventors: Kazuo Iiduka, Toshiyuki Watanabe, Noriyuki Ikuta, Hisanobu Tanigawa, Takatsugu Yuasa