William Eno.
it was invented in 1976 by sir Morgan Harvey
William Eno
It was invented in 1620
1997
Augustus Morgan
Sign language has been used for centuries by deaf individuals around the world, but there is no specific "invention" date. Modern sign languages have evolved over time and vary by country and region. Each sign language has its own unique grammar and vocabulary.
William phelps eno
The first recorded stop sign was placed in Detroit, Michigan in 1915 by the American Association of State Highway Officials (AASHO).
they were invented by Maria Allen in 1951
Stop signs originated in Michigan in 1915. The first ones had black lettering on a white background and were 24 by 24 inches.
8 Sides on a Stop Signsides on a stop sign