Inventions When were bar code scanners invented? 1970s 1960s 1940s 1950s 1970s 1960s 1940s 1950s ANSWER DOWNLOAD EXAMIANS APP
Inventions Which insurance salesman invented the fountain pen in 1884? Sir William Grove Charles Kettering Lewis Edson Waterman George Fountain Sir William Grove Charles Kettering Lewis Edson Waterman George Fountain ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Bakelite? Leo Hendrik Baekeland Henry Ford Charles Goodyear Roy Plunkett Leo Hendrik Baekeland Henry Ford Charles Goodyear Roy Plunkett ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the AEEE (now the IEEE) founded? 1880s 1930s 1950s 1850s 1880s 1930s 1950s 1850s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who synthesized the first wholly artificial gene? Benjamin Franklin J.J. Thompson Hargobind Khorana Meghnad Saha Benjamin Franklin J.J. Thompson Hargobind Khorana Meghnad Saha ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade were the first successful diode and triode vacuum tubes invented? 1900s 1880s 1800s 1890s 1900s 1880s 1800s 1890s ANSWER DOWNLOAD EXAMIANS APP
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