11
/
en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
76332
7005
2

jan 1, 1920 - Yellow Light

Description:

William Potts invents the yellow caution light.

Added to timeline:

6 months ago
0
0
110
Highways

Date:

jan 1, 1920
Now
~ 98 years ago
FeedbackPremiumAboutTermsPrivacy