Marie Van Brittan Brown
Co-invented first home security system. Marie Van Brittan Brown was the inventor of the first video security system based on the rarely-used closed circuit television (CCTV) originally developed by the …
Dr. Gladys Brown West
Photos courtesy of the West family Dr. Gladys Brown West enabled the GPS with her mathematical modeling of the world. As a poor black child born to parents who owned …
Martha Matilda Harper
Martha Matilda Harper is the inventor of the international retail franchising concept and the reclining shampoo chair and cutout sink. Indentured at the young age of seven, Martha Matilda Harper …