[6] Patterson also worked with the Allegheny County Committee on School Legislation and was involved with the Consumers' League of Western Pennsylvania.

[3] In November 1914, Patterson gave a speech before the 46th annual convention of the Pennsylvania Woman Suffrage Association in Scranton.

"Alongside PWSA president Roessing, Patterson led the 1915 drive to amend the Pennsylvania Constitution to allow universal suffrage.

[10][9] On July 7, 1915, at a "Suffrage Day" themed baseball game between the Phillies and the Giants, Patterson threw out the first pitch.

[6][3] Following the April 1917 American entry into World War I, Patterson was appointed to the Woman's Committee of the Council of National Defense.

[12] The following year she was appointed Associate Director of the newly created Field Division of the Council of National Defense and was made a member of its governing board.

[3] The President of the United States of America, authorized by Act of Congress, July 9, 1918, takes pleasure in presenting the Army Distinguished Service Medal to Hannah J. Patterson, a United States Civilian, for exceptionally meritorious and distinguished services to the Government of the United States, in a duty of great responsibility during World War I. Hannah Paterson devoted herself through the whole period of the war to executive work of the Women's Committee of the Council of National Defense, devoting herself with great ability and energy to the organization of the activities and interests of the women throughout the United States in the interest of the successful prosecution of the war and, by her efforts, contributed to the splendid cooperation on the part of the women of the country in the great national emergency.

Patterson later served on the War Risk Advisory Committee alongside future Chief Justice Charles Evans Hughes.

[6] After the war, Patterson returned to Pittsburgh[6] and was an investment advisor, heading the women's department of brokerage firm J. H. Holmes & Co. in the 1920s.

[7][2] In 1931, Patterson managed her friend Sara Soffel's successful campaign for judgeship, helping her become Pennsylvania's first woman jurist.