How to draw the logo on the patent, by hand or by direct CAD?

Patent drawings are usually drawn with Auto CAD or Pro/E. You can search and download these softwares on the website. Some particularly simple charts (flow charts, etc.). ) can be drawn in WORD, etc. It would be easy if you could use Auto CAD or pro/e. If not, you can ask Changning Changqing for information. They specialize in patent paintings. Appearance and practical inventions can be used, as can European and American patent drawings for incubation.