Liancheng CNC sues Jingsheng Mechanical & Electrical in the US for patent infringement involving crystal growth equipment

中国经营网·8 Oct 2026·

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Summary · why it matters

Two major domestic photovoltaic equipment suppliers are fighting a patent battle overseas. Liancheng CNC announced that its subsidiary Liancheng Crystal Technology has sued Jingsheng Mechanical & Electrical in the United States, claiming that some crystal growth equipment-related business sold by Jingsheng Mechanical & Electrical in the US falls within the protection scope of Liancheng Crystal's patented technology, infringing its legal rights, and is demanding that the infringement stop and corresponding compensation be paid. Jingsheng Mechanical & Electrical responded in an announcement that the technical methods used in its products are completely different from those in the patents involved, that there is no evidence its products infringe the patents, and that it will actively defend itself. The patents involved are titled "Seed lifting and rotating system for use in crystal growth," with patent numbers US11,255,024 B2 and US11,814,746 B2, and Liancheng Crystal is the legal patent holder. Liancheng CNC and Jingsheng Mechanical & Electrical are equipment suppliers to LONGi Green Energy and TCL Zhonghuan respectively. Both companies place great emphasis on technological innovation and patent portfolios. As of June 30, 2026, Liancheng CNC and its holding subsidiaries had accumulated 1,025 patents, while Jingsheng Mechanical & Electrical and its subsidiaries had accumulated 1,266 valid patents. There are reports that the case involves Jingsheng Mechanical & Electrical's US customer Tesla, but neither company has given a clear response to reporters.

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