Patents by Inventor Takayasu Asai

Takayasu Asai 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).

  • Synthetic resin optical fiber
    Patent number: 4883338
    Abstract: A synthetic resin optical fiber having the structure simplified and a stable light transmission characteristic is disclosed. The synthetic resin optical fiber comprises a transparent core and a cladding formed around the core, and the cladding has an inner transparent portion and an outer peripheral portion containing a light interruption substance such as a pigment and the like.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: November 28, 1989
    Assignee: Hitachi Cable, Ltd. & Hitachi, Ltd.
    Inventors: Tomiya Abe, Yukio Shimazaki, Takanobu Ishibashi, Norimoto Abe, Takayasu Asai, Noriaki Taketani