Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1880s 1900s 1890s 1800s 1880s 1900s 1890s 1800s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented the BALLPOINT PEN? Write Brothers Bicc Brothers Waterman Brothers Biro Brothers Write Brothers Bicc Brothers Waterman Brothers Biro Brothers ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Dynamite? Sir Alexander Graham Bell Benjamin Franklin Thomas Alva Edison Alfred B. Nobel Sir Alexander Graham Bell Benjamin Franklin Thomas Alva Edison Alfred B. Nobel ANSWER DOWNLOAD EXAMIANS APP
Inventions When were bar code scanners invented? 1960s 1940s 1970s 1950s 1960s 1940s 1970s 1950s ANSWER DOWNLOAD EXAMIANS APP
Inventions What African-American inventor received 5 patents in the field of shoemaking? Elijah McCoy Jan Ernst Matzeliger Lewis Latimer Ernest Just Elijah McCoy Jan Ernst Matzeliger Lewis Latimer Ernest Just ANSWER DOWNLOAD EXAMIANS APP
Inventions What Karl Benz invented? Gasoline powered automobile Steam turbine Glider Streetcar Gasoline powered automobile Steam turbine Glider Streetcar ANSWER DOWNLOAD EXAMIANS APP
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