Ethel Eugenia Patten was a catalog assistant in charge of reclassification from 1939 to 1949. She was born in 1906 in Los Angeles, California. She received her Bachelor of Arts in French from Vassar College in 1926. She studied at University of Lausanne in Switzerland for a summer in 1924. She received her Bachelor of Science in Librarianship from Western Reserve University in 1930. She began to pursue her Master of Arts in 1936 at University of California, Berkeley. At the time of her hire at OSC, she had completed all the work for her M.A., except for a “special study” which she would complete away from the university. Her special study was on the subject of “the printed catalogs of some important private libraries as bibliographical tools.” By the time she came to OSC, she had spent roughly six years working in libraries as an assistant in different departments. She had served as the secretary of the East Bay Library Council, and the President of the Librarians' Association of the University of California. She was also a member of the American Library Association and the California Library Association. At OSC, she received $1800 per year, and resigned in 1949 to take another position.