Inventions Who invented the BALLPOINT PEN? Biro Brothers Waterman Brothers Write Brothers Bicc Brothers Biro Brothers Waterman Brothers Write Brothers Bicc Brothers ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the first solid state integrated circuit demonstrated? 1980s 1960s 1970s 1950s 1980s 1960s 1970s 1950s ANSWER DOWNLOAD EXAMIANS APP
Inventions What J. B. Dunlop invented? Model airplanes Pneumatic rubber tire Automobile wheel rim Rubber boot Model airplanes Pneumatic rubber tire Automobile wheel rim Rubber boot ANSWER DOWNLOAD EXAMIANS APP
Inventions Which scientist discovered the radioactive element radium? Isaac Newton Benjamin Franklin Marie Curie Albert Einstein Isaac Newton Benjamin Franklin Marie Curie Albert Einstein ANSWER DOWNLOAD EXAMIANS APP
Inventions When was barb wire patented? 1895 1840 1874 1900 1895 1840 1874 1900 ANSWER DOWNLOAD EXAMIANS APP
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