On July 12, 712 obtained patents related to a locomotive end switching system, achieving wireless end switching and improving call efficiency for railway locomotive A and B ends.

March 25, according to information from the National Intellectual Property Administration, Tianjin 712 Mobile Communications Co., Ltd. has applied for a patent titled “A Railway Locomotive A/B-End Wireless Swapping and Internal Calling System and Implementation Method.” The authorized announcement number is CN115767473B, and the authorization announcement date is March 24, 2026. The application publication number is CN115767473A, the application number is CN202210668656.5, the application publication date is March 24, 2026, the application date is June 14, 2022, the inventors are Zhao Hualei, Huang Zhigang, Liu Zheng, Zhang Yanming, Li Furan, Jiang Xiaolong, Zhao Li, Yin Baquan, Zhu Nuo, Zou Huayong, Yang Huixin, Xue Jia, and He Song Song. The patent代理机构 is Tianjin Zhonghuan Patent Trademark Agency Co., Ltd., and the patent agent is Li Meiying. Classification numbers are H04W4/42, H04W4/44, H04W4/10, H04W56/00, and H04W88/06.

The patent abstract shows that a railway locomotive A/B-end wireless swapping and internal calling system and implementation method includes a locomotive radio, a ground server, and a synchronization device; the ground server is equipped with a synchronization system server software; a synchronization device on the locomotive A end and a synchronization device on the locomotive B end that are set on the same locomotive are connected to a locomotive radio for data exchange, respectively, through serial port cables; the locomotive A end and B end synchronization devices exchange data through a 5G‑R network and an 800MHz wireless signal, and respectively exchange data with the ground server through the 5G‑R network; the ground server is used to collect comprehensive information of the synchronization devices on the locomotive A and B ends, assist the synchronization devices on the locomotive A and B ends in completing automatic pairing, and after pairing is completed, the synchronization devices on the locomotive A and B ends perform wireless swapping and internal calling; the synchronization devices on the locomotive A and B ends notify their respective locomotive radios of the current operational-end status information; it improves the efficiency of dual-end locomotive wireless swapping while driving and communication between the driver.

According to Tianyancha data, Tianjin 712 Mobile Communications Co., Ltd. was established on August 18, 2000, with Dong Guojun as the legal representative. The industry it belongs to is the manufacturing of computers, communications, and other electronic equipment. The company scale is medium-sized. The registered capital is 152M RMB, and the paid-in capital is 152M RMB. The registered address is Building 4, Rongsheng Square, Zone 1, Unit 506-11, Binhai–Zhongguancun Science Park, Tianjin Economic-Technological Development Area (there is multi-address information). Tianjin 712 Mobile Communications Co., Ltd. has made external investments in 1 company, participated in 946 bidding and tendering projects. In terms of property-related leads, it has 21 trademark information entries, 372 patent information entries, and 83 administrative licenses.

Tianjin 712 Mobile Communications Co., Ltd.’s recent patent information is as follows:

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