Patents by Inventor Masatoshi Ryohko

Masatoshi Ryohko 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).

  • Gas discharge tube capable of lighting in different colors
    Patent number: 5410216
    Abstract: A gas discharge tube that is capable of lighting in different colors. The gas discharge tube, which may contain neon and mercury vapor, and which has its inner surface coated with a photoluminescent layer, is energized with a pulse current. The resultant color of the light emitted from the gas discharge tube depends in part on the frequency of the pulse current.
    Type: Grant
    Filed: April 10, 1992
    Date of Patent: April 25, 1995
    Inventors: Masaaki Kimoto, Ryohei Itatani, Masatoshi Ryohko
  • Discharge lamp and lighting equipment
    Patent number: 4321506
    Abstract: A discharge lamp comprises a high pressure arc tube for high pressure and a low pressure arc tube for low pressure which is electrically connected in parallel to said high pressure arc tube in an outer tube.A lighting equipment comprises a high pressure arc tube for high pressure discharge and a low pressure arc tube for low pressure which is electrically connected in parallel to said high pressure arc tube; and a high frequency lighting starter having 1 KHz to 100 KHz for starting the discharge of said high pressure arc tube.
    Type: Grant
    Filed: December 18, 1979
    Date of Patent: March 23, 1982
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Michihiro Tsuchihashi, Ryohei Itatani, Masatoshi Ryohko, Yutaka Murai