Mary Loos a stroke. Mary Loos Mary Loos (May 6, 1910 – October 11, 2004) was an American actress, screenwriter and novelist. She was occasionally credited under her full name, Mary Anita Loos. Born in San Diego, she was the daughter of Dr. Clifford Loos, co-founder of the Ross-Loos Medical Clinic and the Ross-Loos Medical Group, the first Health maintenance organization (HMO) in the United States. She was the niece of screenwriter Anita Loos. She was both co-creator and one of the writers for "Yancy Derringer" (1958-1959), an American Western TV series. Mary Loos died in Monterey, California, aged 94, due to
Anita Loos but thought Monroe was inspired casting. The success of "Blondes" the second time around meant Loos had a greater profile than ever before. She moved to a more spacious apartment at the Langdon Hotel and bought a car; she and her companion Gladys Tipton would travel to visit friends whenever the mood struck. In 1950, Loos began writing "A Mouse is Born", another novel, and when it was safely in the hands of the publisher she left for the continent, her first trip to Europe in 20 years. A "Mouse is Born" had a lukewarm reception, but by then Loos