Does a patent/utility model give me the right to use the invention I have protected?

No, it does not. Patents and utility models are rights to ban, so they give you the right to ban others from using your invention in business operations.  Your own freedom to operate may, however, be limited by patents owned by others and the legislation. It is a good idea to find out about freedom to operate when you are planning to start business activities, introducing on the market a product of a new type, or moving on to a new business sector. We will help you in IPR surveys and researches of all kinds. More information: Surveying IPR operating environment & Ensuring freedom to operate