One of the most distinctive job-related articles is the hard hat ... you may see them replaced by green-hatted workers. This is because workers with green hats are safety inspectors.

The company’s distinctive three-rib, heat-resistant fiberglass hard hat was developed in the 1940s. In the 1950s and 1960s, thermoplastics replaced fiberglass. In 1982, the standard hard hat ...

“These hats have one serious drawback, aluminum is a great conductor of electricity.” Bullard’s distinctive three-rib, heat-resistant fiberglass hard hat was developed in the 1940s. In the ...

CEO Wells Bullard [Photo: Bullard] Just ask Wells Bullard, CEO and fifth-generation owner of Bullard, the company that invented the hard hat ... use of a new kind of fiberglass composite shell ...