Patents by Inventor Seiichi Tokuo

Seiichi Tokuo 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).

  • Quantum infrared sensor and quantum infrared gas concentration meter using the same
    Patent number: 8803092
    Abstract: The present invention relates to a quantum infrared sensor and a gas concentration meter using the same, the quantum infrared sensor having a small and simple device shape and also being capable of performing stable measurement against disturbance changes such as changes in the flow amount and the temperature of gas to be measured. The quantum infrared sensor includes a pair of quantum infrared sensor elements, a pair of optical filters and a holding frame. The pair of optical filters is provided closer to an infrared light source than is the pair of quantum infrared sensor elements. The pair of optical filters is configured to selectively transmit infrared rays in specific different wavelength ranges, respectively. The pair of optical filters is housed in an upper level of the holding frame and provided while facing the pair of quantum infrared sensor elements through a pair of through holes, respectively.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: August 12, 2014
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Naohiro Kuze, Seiichi Tokuo, Yoshinori Yanagita
  • Quantum Infrared Sensor and Quantum Infrared Gas Concentration Meter Using the Same
    Publication number: 20110090505
    Abstract: The present invention relates to a quantum infrared sensor and a gas concentration meter using the same, the quantum infrared sensor having a small and simple device shape and also being capable of performing stable measurement against disturbance changes such as changes in the flow amount and the temperature of gas to be measured. The quantum infrared sensor includes a pair of quantum infrared sensor elements, a pair of optical filters and a holding frame. The pair of optical filters is provided closer to an infrared light source than is the pair of quantum infrared sensor elements. The pair of optical filters is configured to selectively transmit infrared rays in specific different wavelength ranges, respectively. The pair of optical filters is housed in an upper level of the holding frame and provided while facing the pair of quantum infrared sensor elements through a pair of through holes, respectively.
    Type: Application
    Filed: June 4, 2009
    Publication date: April 21, 2011
    Inventors: Naohiro Kuze, Seiichi Tokuo, Yoshinori Yanagita