Patents by Inventor Takayuki Hisada

Takayuki Hisada 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).

  • Integrated remote keyless entry and ignition disabling system for vehicles, using updated and interdependent cryptographic codes for security
    Patent number: 6043752
    Abstract: A remote-control unit for vehicles in which an immobilizer facility and keyless entry facility are united to enable bidirectional transmission. Further, a cost reduction is achieved by decreasing the number of parts, and labor required for maintenance is diminished. A remote-control unit for vehicles includes a circuit 16 for receiving a cryptographic code CR from a vehicle when a key 10 is fitted into a key cylinder 21, a circuit 17 for storing a cryptographic code, a control circuit for producing a first cipher system code CS1 in response to a cryptographic code, and producing a second cipher system code CS2 in response to actuation of a manual switch 12, and a transmission circuit 15 for transmitting the cipher system codes in the form of radio waves to the vehicle.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: March 28, 2000
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takayuki Hisada, Takao Miyazaki, Kazuyori Katayama