This time of year, we celebrate the efforts of amazing historical figures like Martin Luther King, Jr. and Rosa Parks. Certainly, if it weren't for their determination and sacrifices in the name of equality and civil rights, the world would not be the same. However, there are many other notable African Americans we should acknowledge this month as well. Their contributions may not have been as magnanimous, but they have impacted many of our lives. You may not know their names at first mention, but I bet you know their work. Take a look at the 7 cool must-haves that were invented by African Americans.