Hello, do I need a prototype or a design to apply for a patent for my invented agricultural machinery? Thank you.

You don't need to make a physical product or a prototype to apply for a patent. You just need to describe in detail the differences and advantages of your patented technology compared with existing similar products.

Similarly, you don't need design drawings, just simple black and white line sketches, combined with text descriptions to illustrate your patented technology.

There are three kinds of patents in China: invention, utility model and design.

According to your situation, you can apply for a patent for invention or utility model.

For more patent applications, please search Peking University Union for more help.