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:
Sep. 12, 1989
Filed:
Feb. 27, 1987
Shoji Akutsu, Kawasaki, JP;
Kokusan Kinzoku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
When an outside handle switch, a trunk cylinder switch, a glove box switch, or the like is caused to be in an on position, a combined transmitter/receiver circuit is caused to operate through an input discriminator. The input discriminator will initiate wireless communication between a user side main controller and a subcontroller through the intermediary of an antenna. The user side main controller is formed into a card and includes a loop antenna, a combined transmitter/receiver circuit, and a microcomputer. The user side subcontroller is formed into a card and includes a loop antenna, a combined transmitter/receiver circuit, and a microcomputer. When the combined circuit receives a signal from the main card lock and subcard lock, the signal is forwarded to the user side controller position discriminator circuit. This position discriminator discriminates the vehicle outside or vehicle inside position of the main card lock and the subcard. The signal from the main card lock and the subcard is preserved provisionally in the vehicle side main controller and is then transmitted to the user side controller discriminator circuit. When the discriminator circuit receives signals from the main card lock and the subcard lock, it will discriminate between the combined signal patterns. When the discriminated signal part corresponds to the signal part related to the main card lock, the signal part from the main card lock will be delivered to a pulse conversion circuit. When the discriminated signal corresponds to the signal part related to the subcard, that signal will be transmitted.