Show:
inventors a-f
inventors H-M
inventors n-q
inventors R-U
inventors v-z
100
Earle Dickerson
What is inventor of band aid
100
Charles Towns
What is inventor of the laser
100
1937
What is year the o-ring was invented
100
italy
What is country radio comes from
100
America
What is what country does vaccum originate from
200
to cool down room
What is purpose of air conditioning
200
1954
What is year the laser was invented
200
pager
What is invented by Al Gross
200
Tea bag
What is What did Thomas Sulivan invent
200
Washing machine
What is built to wash clothes
300
Mark Zuckerburg
What is inventor of facebook
300
California
What is state where the mac was invented
300
1921
What is year pager was invented
300
England
What is where does safety pin originate
300
x-ray
What is machine that shows your bones
400
Geiger counter
What is the invention that made Hans Geiger famous
400
1983
What is the year the mac was invented
400
Q tip
What is what David Gregg invented
400
1852
What is when umbrellas were invented
400
yellow pages
What is built by Rueben Pomelly
500
Joseph Nicephore
What is the inventor of the camera
500
1882
What is when the electric iron was invented
500
China
What is where was nail polish invetned
500
Samuel Fox
What is who invented umbrellas
500
1886
What is year yellow pages was invented