Inventions What African-American inventor received 5 patents in the field of shoemaking? Jan Ernst Matzeliger Elijah McCoy Lewis Latimer Ernest Just Jan Ernst Matzeliger Elijah McCoy Lewis Latimer Ernest Just ANSWER DOWNLOAD EXAMIANS APP
Inventions In which decade was the transistor invented? 1980s 1960s 1950s 1940s 1980s 1960s 1950s 1940s ANSWER DOWNLOAD EXAMIANS APP
Inventions Who invented Fountain Pen? Lewis E. Waterman Kirkpatrick Macmillan John J. Loud Sir Frank Whittle Lewis E. Waterman Kirkpatrick Macmillan John J. Loud Sir Frank Whittle ANSWER DOWNLOAD EXAMIANS APP
Inventions What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes? Charles Richter Giuseppe Mercalli Hiram Walker Joshua Rumble Charles Richter Giuseppe Mercalli Hiram Walker Joshua Rumble ANSWER DOWNLOAD EXAMIANS APP
Inventions Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent? Banjo Clarinet Oboe Harmonium Banjo Clarinet Oboe Harmonium ANSWER DOWNLOAD EXAMIANS APP
Inventions Who was the first American female to patent her invention, a method of weaving straw with silk? Mary Kies Amanda Jones Marjorie Joyner Margaret Knight Mary Kies Amanda Jones Marjorie Joyner Margaret Knight ANSWER DOWNLOAD EXAMIANS APP
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