inventions

what

telephone, television, car, personal computer, shoes with special heels, shoes with lights, hot ice-cream scoop, tea, potato chips, zipper, basketball

Whitcomb Judson, Shen Nong, Alexander Graham Bell, George Crum, James Naismith

who

use

seeing in the dark, serving really cold ice-cream, change the style of the shoes, for fun and exercise

when

1876, 1885, 1927, 1971, 1893, about 5,000 years ago, over 100 years ago, a century ago, during the 6th century, around 1660