In Harry Potter and the Order of the Phoenix, one of the departments in the Ministry of Magic referred to is the "Ludicrous Patents Office".
“Level seven, Department of Magical Games and Sports, incorporating the British and Irish Quidditch League Headquarters, Official Gobstones Club, and Ludicrous Patents Office.”
(Harry Potter and the Order of the Phoenix - Chapter Seven)
What is the Ludicrous Patents Office? What does it do? Do we have any other uses of it in canon? Does the Ministry really need an office devoted to wacky ideas?
Rowling-canon is preferred, but other answers are still welcome.