What can I write about the patent of desktop board-level power supply?

Invention patents, utility model patents and design patents. A patent for invention should be novel, creative and practical. The utility model patent is one of three kinds of patents (invention, utility model and design), and utility model refers to a new practical technical scheme for the shape, structure or combination of products. The patent law requires lower creativity and technical level of utility model than invention patent, but it has great practical value. In this sense, utility models are sometimes called small inventions or small patents. Industrial design refers to a new design with aesthetic feeling and suitable for industrial application based on the shape, pattern or combination of products and the combination of color and shape and pattern.