Danzy World*

Great site for Computer and Internet Tricks with Entertainment FUN !

Sponsor

Propellerads

Feb 24, 2019

Seven Black Inventors Whose Patents Helped Shape American Life

Garrett Morgan created an improved gas mask. Marie Van Brittan Brown patented a home security system. Lonnie Johnson dreamed up the Super Soaker.

from NYT > Technology https://ift.tt/2EsbjMK

No comments:

Post a Comment

Adbox