Above you can see an example of the Advanced Search Page.
I filled my example patent number 5,470,270 in the query box. However, since this is a page that allows you to search for a patent by: number, inventor's name, claims, title of invention, and many more ways. I had to fill in the query box using PN/5,470,270.
The PN stands for patent number and a backslash / is added before the number. Design patent D265,332 would be written PN/D265,332. These special codes tells the database if I am searching by number, inventor's name, title, etc. All the different codes are listed on the Advanced Search Page.
There is also a drop down menu box for selecting what years you want your search to cover.


