Patents by Inventor Teruo Koiko

Teruo Koiko 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).

  • Lamp comprised of a composite reflector and aspheric lenses
    Patent number: 6244731
    Abstract: A lamp is composed of a light source, a composite reflector consisting of a plurality of reflecting surface units, and aspheric lenses provided to correspond to the individual reflecting surface units. The composite reflector includes a first and a second reflecting surface units. Each of the first reflecting surface units is formed of a reflecting surface configuration obtained by cutting, radially around a center axis of the light source, a portion from a spheroid having a first focal point located on the center axis and adjacent the light source and a second focal point located on a line passing through the first focal point and tilted appropriately from the center axis such that the cut portion spans a range of 15° to 90° around the center axis. Each of the second reflecting surface units is composed of a second reflecting surface configuration obtained by similarly cutting a portion from a spheroid having a second focal point located external to the first reflecting surface configuration.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: June 12, 2001
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Teruo Koiko, Takashi Futami, Yoshifumi Kawaguchi