The first successful <a href="https://en.wikipedia.org/wiki/Adding_machine" id="mwyA" rel="mw:WikiLink" title="Adding machine">adding machine</a> in the United States is patented by <a href="https://en.wikipedia.org/wiki/William_Seward_Burroughs_I" id="mwyQ" rel="mw:WikiLink" title="William Seward Burroughs I">William Seward Burroughs</a>.