The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 2000
Filed:
Feb. 10, 1999
Shin-Chung Chen, Luchu Hsiang, Taoyuan Hsien, TW;
Sen-Jung Chen, Luchu Hsiang, Taoyuan Hsien, TW;
Other;
Abstract
A keyless lock device is disclosed, which has a master control unit installed in a car and a remote controller carried by a user. The master control unit has a processing unit connected to a centralized locking control unit of the car to lock and unlock the door of the car. A detection switch is installed in the door handle of the driver-side door of the car. The processing unit is connected to the detection switch to detect when the door handle is pulled. The master control unit transmits an acknowledgement signal when the door handle is pulled. The remote controller receives the acknowledgement signal and generates a re-acknowledgement signal encoded with a specific encrypted code for transmission. The re-acknowledge signal is then received by the master control unit to be recognized.