Thank you for inviting me. The software required for American design patent drawings is CDR, AI or CAD. Need to have a little aesthetic foundation, be familiar with the characteristics of product surface, and clearly express the relationship between product surface characteristics. When drawing, we need to pay attention to the line width relationship between the shadow line and the contour line, and some details such as dotted line processing are needed, which are not clear in a few words. If you want to do it specifically, you still need to consult more relevant information, hoping to help you!