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Desillus Solutions Inc. 的电子学习

你可以成为发明家!点击了解。

专利图纸介绍(基础篇)

4 最常见的 PTO 拒绝

Trade Marks, Trade Dress and Trade Secret

How to convert text into broken line text in AutoCAD

Tips for tracing images

设计课

Design Patent Classes

专利分类

Patent Classification

专利种类代码

Patent Kind Codes

绘图员的符号

Illustration Symbols

Reasons for Patent Application Rejections

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