Bullard (1893-1963), a U.S. Army veteran who ... process," the National Museum of American History reports. The Hard Boiled Hat, first developed in 1919, quickly evolved with better designs ...

Bullard of San Francisco, California developed the first hard hat, basing it on the Doughboy helmet he wore as a soldier in World War I. The helmet was made of canvas, glue, and black paint, and given ...

Bullard (1893-1963), a U.S. Army veteran who crafted the world's most important piece of industrial protective equipment after returning from the carnage of World War I. "Hard-hat workers are ...