Invention
6 questions tagged Invention — spanning every one of the seven Ws.
When was the Haber process developed?
The Haber process was developed in 1909, and it was first patented in 1910. It made large-scale synthetic ammonia production possible.
When was the first commercially successful electric lightbulb sold?
Edison's practical incandescent lightbulb was introduced commercially in 1880. It quickly became a major step toward widespread electric lighting.
When was the first elevator safety brake invented?
Elisha Otis demonstrated the first practical elevator safety brake in 1853.
When did the first ornithopter patent appear?
Early flying-machine ideas inspired ornithopter patents in the 19th century, including a notable patent in 1869 by Alphonse Pénaud and Paul Gauchot.
Whose idea led to the smallpox vaccine?
Edward Jenner developed the first successful smallpox vaccine in 1796. He used material from cowpox to protect against smallpox.
Whose invention was the practical telephone switchboard?
Emilie Berliner? No—the practical telephone switchboard was developed by operators and engineers in the early telephone era, but a well-known name linked to the telephone exchange is Tivadar Puskás. He helped develop the central telephone exchange concept in the 1870s.