a traffic light

Inventions Science 1 of 1 appearances
Practice Inventions

"a traffic light" appearances by year

84
89
1
94
99
04
09
14
19
24

All Inventions clues by year

29
84
20
89
59
94
84
11
99
18
04
21
09
22
14
15
19
16
24
Filter:
# Clue Answer As Given Value Round Category Air Date Show
In the 1920s Garrett Morgan created an automated one of these & a lot of drivers stopped & took notice a traffic light $500 J BLACK INVENTORS 1992-04-15 #1768
« Back to Inventions