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 …
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 …