中文译文
一份关于 ${invention} 的复古专利文件，风格仿照 19 世纪末美国专利局的申请档案。页面上有精确的技术图纸，带有编号标注（Fig. 1、Fig. 2、Fig. 3），展示正面、侧面和爆炸视图。用钢笔墨水手写的注释描述其机械结构。纸张呈陈年象牙色，带有霉斑和柔和的折痕。角落处有一枚官方压印印章和红色火漆印。底部有发明者手写签名和日期。整张图像宛如一份被重新发现的档案文件——权威、充满历史感，又略带神秘。
English original
A vintage patent document for ${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.
