Was Marie Van brittan Brown a slave?

Marie brown brown a slave. but she had good education and the first female to invent a home security system that really works. she was born 1922 and died on 1999 its not much info. but knowing that she accomplish her goal is okay. Marie brown brown a slave. but she had good education and the first female to invent a home security system that really works. she was born 1922 and died on 1999 its not much info. but knowing that she accomplish her goal is okay.