Patent office

A patent office is a governmental or intergovernmental organization which controls the issue of patents. In other words, "patent offices are government bodies that may grant a patent or reject the patent application based on whether the application fulfils the requirements for patentability." 
List of patent offices.
For a list of patent offices and their websites, see the World Intellectual Property Organization (WIPO) maintained list, here. 
"The entries shown in italics are regional or international patent offices."