&gt; What service did you render to Square to earn the payment you claim to deserve?<p>the service rendered was he made public the details of the invention.  Whether Square read or did not choose to read the patent is beside the point.<p>&gt; Did they get the idea for their product from your patent?  Did they learn how to implement their process from patent?<p>You are assuming that Square did not read his patent - which if true suggests that Square inefficiently re-invented the wheel.  You know, that whole standing on the shoulders of giants thing.<p>However, what we find happening lately is the concept of efficient infringement where large corporations have found it more cost effective to infringe and fight with their lawyer muscle than to pay inventors their due rights.