Patents by Inventor Yukihiro Tsumura

Yukihiro Tsumura 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).

  • Radio wave power measuring apparatus
    Patent number: 4223264
    Abstract: A radio wave power measuring apparatus is disclosed, which includes a thel load confined in a reference temperature housing, a wave absorber disposed in the load for absorbing radio waves supplied thereto, a heater for heating the load, a thermoelectric cooler element provided between the housing and the load for the load, a temperature difference detector having a thermoelectric sensor element provided between the housing and the load for detecting the difference in temperature between the housing and the load, a heater controller for feeding to the heater the power corresponding to the temperature difference detected by the detector so as to maintain the load and the housing at the same temperature, and a measuring member for measuring the power fed to the heater.
    Type: Grant
    Filed: December 12, 1978
    Date of Patent: September 16, 1980
    Assignees: Director-General of the Agency of Industrial Science and Technology, Anritsudenki Kabushikigaisha
    Inventors: Kyohei Yamamura, Takemi Inoue, Toshio Nemoto, Hidetoshi Miyao, Yukihiro Tsumura, Hiromichi Toda, Itsuo Sugiura