一项发明的复古专利文件

一份关于 {argument name="invention" default="INVENTION"} 的复古专利文件，其风格模仿了 19 世纪后期美国专利局的备案文件。页面上是精确的技术图纸，带有编号标注（图 1、图 2、图 3），展示了正面、侧面和分解视图。钢笔墨水手写注释描述了各种机械装置。纸张呈陈旧的象牙色，带有锈斑和柔和的折痕。角落处有一个官方的浮雕印章和红色蜡封。底部有发明者的手写签名和日期。整幅图像给人一种从档案中找回的权威、历史且略带神秘感的文件之感。

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**Original English:**
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.