Hulda Regina Graser (also known as, H. R. Graser; after marriage, Luebbert; June 23, 1870 – January 14, 1943) was a Canadian-born American customs house broker. In her day, she was the only woman in the world who worked in this occupation. In December 1897, a few months after her wedding, the United States Department of the Treasury, in Custom house broker, femme sole (18653.), determined the style of Graser's professional married signature under Coverture law. Graser counted Eleanor Roosevelt as a friend.