While the pages of history often spotlight well-known inventors, there are unsung heroes whose contributions have profoundly impacted our world. One such person is William B. Purvis, born in Philadelphia, Pennsylvania, into a wealthy and influential family, one of the eight children of Joseph Purvis, a farmer, and Sarah Louisa Forten Purvis, a noted poet. | By Tamara Shiloh While the pages of history often spotlight well-known inventors, there are unsung heroes whose contributions have profoundly impacted our world. One such person is William B. Purvis, born in Philadelphia, Pennsylvania, into a wealthy and influential family, one of the eight children of Joseph Purvis, a farmer, and Sarah Louisa Forten Purvis,