A patent is usually used as infringement protections for inventions and its subsequent developments. Note however, that patent has a very broad area of patenting applications. But remember that patents duly apply to inventions or creations with novel and exceptional functions.
Say for example, electronic circuit board with novel and cutting-edge functionality that is not only of top quality but less expensive. This is known as Utility Patent. Or a mobile phone with especial identifiable design only related to its brand. This is known as Design Patent.