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last 30 patents
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Positioning light beam emission system, method and indoor positioni...
Patent number
10,725,147
Issue date
Jul 28, 2020
BEIJING GUO CHENG WAN TONG INFORMATION TECHNOLOGY CO., LTD
Rongsheng Dong
G01 - MEASURING TESTING
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First device, system and method to communicate with second device
Patent number
9,497,575
Issue date
Nov 15, 2016
BEIJING GUOCHENGWANTONG INFORMATION TECHNOLOGY CO., LTD
Cheng Guo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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last 30 patents
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FIRST DEVICE, SYSTEM AND METHOD TO COMMUNICATE WITH SECOND DEVICE
Publication number
20160134997
Publication date
May 12, 2016
Beijing Guochengwantong Information Technology Co. Ltd
Cheng GUO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Application
Methods and Devices for Transmitting /Obtaining Information by Visi...
Publication number
20140321859
Publication date
Oct 30, 2014
Beijing Guo Cheng Wan Tong Information Technology Co Ltd.
Cheng GUO
H04 - ELECTRIC COMMUNICATION TECHNIQUE