复古发明专利文件

生成19世纪美国专利局风格的复古发明专利文件，包含精密技术图纸与手写批注，重现历史文档的权威感。 A vintage patent document for {argument name="invention" default="INVENTION"}, styled after late 1800s United States Patent Office filings. The page features precise technical drawings with numbered callouts (Fig. 1, Fig. 2, Fig. 3) showing front, side, and exploded views. Handwritten annotations in fountain-pen ink describe mechanisms. The paper is aged ivory with foxing stains and soft fold creases. An official embossed seal and red wax stamp appear in the corner. A hand-signed inventor's name and date appear at the bottom. The entire image feels like a recovered archival document—authoritative, historic, and slightly mysterious. 信息图 / 教育视觉图 草图 / 线稿 复古 / 怀旧 图表 nanobanana