Patents by Inventor Toshiko Suda

Toshiko Suda 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).

  • Novel skin-whitening agent
    Patent number: 4771060
    Abstract: A novel skin-whitening composition comprising as an active ingredient a compound of the formula: ##STR1## useful for the prophylaxis and treatment of skin troubles due to melanin metabolism disorder.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: September 13, 1988
    Assignee: Teikoku Seiyaku Kabushiki Kaisha
    Inventors: Yoshinori Nakagawa, Toshiko Suda, Masaaki Hayami