When the inventor imagined his or her invention, it must have been 3D. More or less, this means that the inventor sees how the invention will be made to the public. But there is a problem. Most inventors use 2D sketches or blueprints to express the appearance and functionality of the invention, which does not help the manufacturing process. Unless the inventors are trained in the art of 3D CAD modeling, their sketches and blueprints are of no use other than the patent process. That\'s why there are 3D CAD services specifically tailored to 3D modeling for such projects. 2D to 3D is basically the process of converting 2D drawings or sketches into 3D models that can be used to actually develop injection molds, mechanical parts, mechanical, electrical, CNC, and other types of manufacturing used today. Before an invention can start and start running first, a prototype must be made to evaluate any manufacturing, stress defects, functions, safety, and several other problems that may arise after the product is manufactured. All inventions must be thoroughly tested before hitting the consumer\'s hand. If this is not done, companies that produce these products will put consumers at risk. That\'s you and me. I know that if I buy a product from a local supermarket, due to the ignorance of the designer, engineer or manufacturer, it will catch up with the break and I will get my money back. As a result, the profit margins of the companies that produce it have fallen sharply. That\'s why it\'s better for inventors and engineers who are engaged in invention design to do it right for the first time. Prototype design is a very important part of the invention design process. if it is not the most important part, it should be very careful and considered. The main idea for a prototype designer is to achieve maximum functionality, comfort, visual appearance, reliability, minimize manufacturing costs with the best materials and techniques. CAD drawing service is the pillar of the design of the invention. These CAD design services provide the 2D to 3D CAD conversion required by most inventors to complete the manufacturing of 3D CAD models. However, it is difficult for CAD designers specializing in invention design to find. Most CAD drawing or 3D modeling companies focus only on technical drawings of mechanical, civil, structural, architectural, electrical, MEP or other types. Custom 3D modelers are rare among CAD designers and must have special creativity and knowledge in all design areas of the engineering field. Most companies working on design inventions outside the normal range also want to be paid. It is difficult to find a company that will honestly charge the inventor for the fixed cost of engineering and research and only for the design time. So far, the only one I have personally found in the field of invention is straight line design.