UNITED STATES OF AMERICA : FACTS OF PATENT

US patent facts   

• More than half of all US patent applications originate from outside the country
• Only 2.5% of small businesses in the US report any patenting activity, including filing patents or purchasing them from others
• A US patent only protects intellectual property within the US
• The US Patent and Trademark Office employs 7,800 examiners to review patent applications every day - but there's still a backlog

Source: USPTO