Benjamin Franklin made life better for the early American colonies. He designed the first public library.  Amazingly, the lightning rod, which was an invention of Ben Franklin, is used even now. He also interestingly improved a stove to have two times the heat with less wood. But if you want to cook with a stove, you need to see better. That's why Franklin made bifocals. They help people see near and far. He didn't patent his inventions because he wanted people to copy him. Benjamin Franklin figured out how to fix the colonies with ingenious devices.