Patents by Inventor Masaharu Keneko

Masaharu Keneko 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).

  • Liquid crystal composition and liquid crystal display device
    Patent number: 5453217
    Abstract: A liquid crystal composition comprising a fluorine liquid crystal material and at least one azo dichroic dye selected from each of the groups (A), (B), (C) and (D) represented by the following general formulae (I)-(IV): ##STR1##
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: September 26, 1995
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaharu Keneko, Masami Kadowaki