Patents by Inventor Suichi Nagaoka

Suichi Nagaoka 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).

  • Keyless entry system
    Patent number: 8155827
    Abstract: An on-vehicle control unit includes a memory storing a first data group having signal strength information of a plurality of request signals transmitted from a plurality of transmitting antennas before and after movement of a movable object when a portable device is placed along an inner surface of a vehicle and a second data group having signal strength information of the plurality of request signals transmitted from the plurality of transmitting antennas before and after the movement of the movable object when the portable device is placed along an outer surface of the vehicle. The on-vehicle control unit determines which of the first and second data groups request signal strength information received from the portable device closely resembles.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: April 10, 2012
    Assignee: Alps Electric Co., Ltd.
    Inventors: Satoshi Nakajima, Satoshi Hayasaka, Suichi Nagaoka