Patents by Inventor Ryohko Masatoshi

Ryohko Masatoshi 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: 5132590
    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 on the combination of the pulse shapes and duty factors constituting the pulse current.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: July 21, 1992
    Inventors: Masaaki Kimoto, Ryohei Itatani, Ryohko Masatoshi