"Goodyear will never have to pay me what it cheated me out," Ledbetter said of her former employer. "In fact I will never see a cent from my case, but with the presidents signature today, I have an even richer reward. I know that your daughters and granddaughters will have a better deal, and that's what makes this fight worth fighting."
In earlier remarks, the president said the law bearing Ledbetter's name reached further. "It's the story of women across this country still earning just 78 cents for every dollar men earn -- women of color even less -- which means that today, in the year 2009, countless women are still losing thousands of dollars in salary, income and retirement savings over the course of a lifetime."
That discrepancy translates into $210,000 less for women over a 35-year, full-time work life, according to an August 2008 study from the Institute for Women's Policy Research.
At a press conference following the ceremony, House Speaker Nancy Pelosi called Ledbetter "a very courageous woman.
"She will not benefit at all from this legislation. Every other working woman in America will," Pelosi said.
ABC News' Jake Tapper and Sunlen Miller contributed to this report.