Thanks to the fine research and work of Mr. Joseph McMillan of the American Heraldry Society we know what the coats of arms of those armigerous (i.e. bearing a coat of arms) signers of the Declaration of Independence are. So much for the erroneous idea that heraldry is pointless and foreign in American culture. If you wish to see a key identifying them you can view it at the website of the American Heraldry Society.
beautiful work, thanks for the link