Patent 7065439 was granted and assigned to Alpha Corporation on June, 2006 by the United States Patent and Trademark Office.
An indicator (5) is provided, which displays that it is a locking confirmable period, for predetermined time after locking the door, in a vehicle door locking and unlocking system S, which locks or unlocks the vehicle door by performing communication between a controller (6), which controls locking or unlocking of the vehicle door, and a portable machine (7).