[header] How to find patents [title] Search the united states patent and trademark office website. [step] The website for the united states government's patent office lets you search through its patents as far back as 1790. [substeps] You can access the search engine for the u.s. patent and trademark office at uspto. Gov and then follow the links to " patents " and " patent search. 
" [title] Search for other individual countries' official patent offices. [step] If you are interested in searching for patents in a particular country other than the united states, you can search online for the patent office of that country.