发明人冯建国,杨光,张德明. "Method for the Synthesis of 4-Ethoxy-2-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 113812778 B, 授权公告日 2021-12-02.
发明人刘建华,郭海燕,冯建国. "A Process for Preparing High-Purity 4-Ethoxy-2-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 110897259 A, 授权公告日 2025-08-22.
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