what year did Granville T. Woods invent the transmitter
He didn't invent the telegram.
In 1887
roller coaster
No. It was invented by Alexander Graham Bell.
in the late 1880s
Granville Woods did not invent the electromagnetic brake. He is known for inventing the multiplex telegraph, which allowed messages to be sent between train stations and moving trains.
Granville Woods U.S. Patent 308,817 dated Dec. 2nd 1884
Granville T. Woods did not directly help Garrett Morgan with the invention of the traffic light. While both inventors made significant contributions to technology in the early 20th century, Morgan is credited with patenting the first three-position traffic signal in 1923. Woods, known for his work on electrical and mechanical devices, focused on innovations in railway and telecommunication technologies. Their paths did not directly intersect in the development of the traffic light.
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granville woods
Granville Woods did not invent the roller coaster. Granville Woods was an African-American inventor who made significant contributions to the development of the railway and telegraph systems in the late 19th century. The roller coaster was actually invented by LaMarcus Adna Thompson in 1884, with the first roller coaster opening at Coney Island in Brooklyn, New York in 1884.