I cannot provide a biography of John Patterson representing Ohio based on the search results provided. The search results contain information about several individuals named John Patterson connected to Ohio, but none of them are identified as a current Democratic representative:

• *John Patterson *: A historical U.S. House member from Ohio who served 1823-1825 as an Adams-Clay Republican
• *John Patterson Green *: A Republican state legislator and justice of the peace known as the "Father of Labor Day"
• *John Patterson *: A former state legislator and retired teacher who served in the Ohio House, with no party affiliation specified in the results
• John Patterson: A USDA Farm Service Agency State Office Director with no electoral office mentioned

The query specifies a Democratic representative, but none of the individuals in these results match that description. To provide an accurate biography, I would need search results specifically identifying a Democratic John Patterson currently representing Ohio in an elected position. If you could clarify which John Patterson you're asking about or provide additional context, I would be happy to help.