Marian R. Croak (1955- )

Marian R. Croak has contributed to the expansion of technology, especially Voice Over Internet Protocol (VOIP), throughout her career. Croak attended the University of California and Princeton University, graduating with a Ph.D. in Qualitative Analysis and Social Psychology in 1982. Little is known about the … Read MoreMarian R. Croak (1955- )

William Chester Ruth (1882-1971)

William Chester Ruth, 1950 Image Courtesy of Anita Wills William Chester Ruth was an African American inventor, business owner, and community leader in Chester County, Pennsylvania.  Ruth was the son of Samuel and Maria Louisa Pinn-Ruth.  The 54th Massachusetts Infantry Regiment liberated Samuel, a former … Read MoreWilliam Chester Ruth (1882-1971)

Garrett A. Morgan Sr. (1877?-1963)

Inventor, entrepreneur, and publisher Garrett A. Morgan Sr. received patents for a three-position traffic signal and a safety hood that was designed to aid breathing in smoke-filled areas. He gained national attention when he utilized his mask to rescue men trapped during a tunnel explosion … Read MoreGarrett A. Morgan Sr. (1877?-1963)

Emmett Chappelle (1925 – )

Emmett Chappelle, inventor, was born in Phoenix, Arizona on October 25, 1925. His scientific research and the 14 United States patents he received for his inventions make Chapelle’s contributions vital to the scientific world. Much about Chappelle’s earlier life cannot be ascertained. He attended the … Read MoreEmmett Chappelle (1925 – )