What you can do to minimize shift work sleep disorder. If you work a non-traditional shift like the night shift or rotating shifts, you may be missing out on more than daylight and watching your kidsâ soccer games. You could be missing out on sleep and better health. Advertising Policy.
Lonnie George Johnson (born October 6, 1949 in Mobile, Alabama) is an African American inventor and engineer who holds more than 80 patents. Johnson is most known for inventing the Super Soaker water gun, which has ranked among the world's top 20 best-selling toys every year since its release.
They tell about one of Jefferson Davis's slaves who invented a new screw propeller for steam-driven ships. He couldn't patent it, of course; but it served the South during the war that was fought to keep him a slave. The first patent to a black freeman was given in 1834 to Henry Blair for his new seed-planter. But records of patents, even to freed blacks, are rare before the Civil War. For one thing, black inventors usually put their patents in the name of a white lawyer. That improved chances for acceptance of their invention.