1easy
Who is credited with inventing the practical incandescent light bulb?
2easy
Who invented the telephone?
3easy
Who invented the first successful powered airplane?
A.Wilbur and Orville Wright
4easy
Who invented the printing press with movable type in Europe?
5easy
Who is credited with inventing the first practical automobile (gasoline)?
6easy
Who invented the radio (wireless telegraphy)?
7medium
Who invented the phonograph?
8medium
Who invented the first successful steam engine (improved design that powered industry)?
9medium
Who invented the telegraph and Morse code?
10medium
Who invented the first polio vaccine?
11medium
Who invented penicillin (discovered the antibiotic effect)?
12medium
Who invented the mechanical reaper, revolutionizing agriculture?
13medium
Who invented the cotton gin?
14medium
Who invented the first practical sewing machine?
15medium
Who invented the dynamo and made key contributions to electrical engineering?
16medium
Who invented the first successful steam locomotive?
17hard
Who invented the World Wide Web?
18hard
Who invented the first practical refrigerator (for home use)?
D.Fred W. Wolf (and others)
19hard
Who invented the first successful mechanical calculator?
20hard
Who invented the first commercially successful typewriter?
C.Christopher Latham Sholes (QWERTY)
21hard
Who invented the first practical bicycle (with pedals)?
A.Pierre Michaux (and others)
22hard
Who invented the first successful electric battery?
23hard
Who invented the first practical revolver?
24hard
Who invented the first practical safety elevator (with brake)?
25hard
Who invented the first successful mechanical reaper in the U.S.?