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:
Mar. 11, 2003
Filed:
Apr. 02, 2001
Shinji Matsudaira, Daito, JP;
Other;
Abstract
The invention provides an antitheft system comprising an alarm unit attachable to a commodity, and an antitheft gate installed in the vicinity of an exit of a store and having incorporated therein a transmitting circuit for producing an alarm activating signal for the alarm unit . The alarm unit comprising a buzzer , receiving antenna and control circuit . The control circuit comprises an interrupt detecting circuit alternatively settable in an interrupt permitting mode wherein the signal received by the antenna is permitted to pass through the circuit or an interrupt prohibiting mode wherein the received signal is prevented from passing therethrough, and a CPU for judging whether the received signal input from the interrupt detecting circuit is the alarm activating signal. The CPU activates the buzzer when the received signal is the alarm activating signal, while setting the detecting circuit in the interrupt prohibiting mode for a predetermined period of time when the received signal is not the alarm activating signal. This suppresses shortening of the life of battery due to useless power consumption of the alarm unit
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile