Patents by Inventor Yasushi Ohtuka

Yasushi Ohtuka 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).

  • Vehicle turn signal lamp having light bulb covered with transparent cap and transparent lens for enhancing vehicle lamp appearance
    Patent number: 6050706
    Abstract: A vehicle lamp includes an amber light bulb covered with a cup-shaped colorless transparent cap, thus emitting an amber light beam. A colorless, transparent, plain lens is employed. Furthermore, the inner surface of the cylindrical portion of the transparent cap is formed into a plurality of side steps, and the inner surface of the front end portion of the transparent cap is shaped into a Fresnel lens, and the outer surface of the front end portion is shaped into a plurality of fisheye lenses, which makes it more difficult to see the amber light bulb. Therefore, the vehicle lamp appears deep and glittering.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: April 18, 2000
    Assignee: Koito Manufacturing Co., Ltd.
    Inventors: Yasushi Ohtuka, Masataka Chouji, Naoki Kakiuchi