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:
Aug. 11, 2015
Filed:
Mar. 27, 2014
Inventec (Pudong) Technology Corporation, Shanghai, CN;
Inventec Corporation, Taipei, TW;
Chia-Min Cheng, Taipei, TW;
INVENTEC (PUDONG) TECHNOLOGY CORPORATION, Shanghai, CN;
INVENTEC CORPORATION, Taipei, TW;
Abstract
This disclosure provides a search device, a person loss prevention system and an operation method. The person loss prevention system comprises an electronic device and the search device. The search device includes a receiver and a transmitter electrically connected with the electronic device. The person loss prevention system instructs the transmitter to transmit a predetermined signal to the receiver by the operation method. After the receiver receives the predetermined signal, the receiver sends a feedback signal to the electronic device. The electronic device adjusts a waveform of a sound signal according to the feedback signal and transmits the sound signal to the search device. The search device plays the sound signal through a speaker unit. Thereby, the user of the electronic device immediately determines the position, the distance and the direction of the receiver.