{{US patent|123456|link text}}
{{US patent|123456}}
{{US patent|src=uspto|123456}}
{{US patent|3 541 541|US3541541}}
{{US patent|src=uspto|3541541|US3541541}}
{{US patent|4687200|Nintendo's D-pad Patent}}
{{US patent|src=uspto|4687200|Nintendo's D-pad Patent}}