Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1900s 1890s 1800s 1880s 1900s 1890s 1800s 1880s ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the transistor invented? 1960s 1980s 1950s 1940s 1960s 1980s 1950s 1940s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented the battery? Thomas Edison James Hargreaves John Wilkinson Alessandro Volta Thomas Edison James Hargreaves John Wilkinson Alessandro Volta ANSWER DOWNLOAD EXAMIANS APP
Inventions When was the Raggedy Ann doll patented? 1919 1915 1920 1911 1919 1915 1920 1911 ANSWER DOWNLOAD EXAMIANS APP
Inventions What invention was first installed at a Hartford, Connecticut bank in 1889? Pay telephone Automatic teller machine Burglar alarm Time-lock safe Pay telephone Automatic teller machine Burglar alarm Time-lock safe ANSWER DOWNLOAD EXAMIANS APP
Inventions What African-American inventor received 5 patents in the field of shoemaking? Ernest Just Jan Ernst Matzeliger Lewis Latimer Elijah McCoy Ernest Just Jan Ernst Matzeliger Lewis Latimer Elijah McCoy ANSWER DOWNLOAD EXAMIANS APP
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