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There are black inventors, just like there are whites who play professional basketball. No black person has invented anything comparable to the telegraph, the locomotive, the radio, the airplane, the automobile, the television, or the computer.
You better read more.... if you think blood plasma is less important than these things, its becasue you are focused on "money elements" and ignore the values that serve humanity.
Long before man could string a wire to do teletype with burst of clicks, Africans had been using sound to communicate over great distance with drums..
Many people attribute the invention of the smartphone to Europeans, but in fact, the first digital cell phone was invented by an African American man named Jesse Eugene Russell.
You might want to learn about what is The Real McCoy. (Lubricators were a boon for railroads, as they enabled trains to run faster and more profitably with less need to stop for lubrication and maintenance.)
You might want to learn who is "Mark Dean" when you talk about Computers
Garrett Morgan came up with several significant inventions, including an improved sewing machine and the gas mask. However, one of Morgan's most influential inventions was the improved traffic light. Without his innovation, drivers across the nation would be directed by a two-light system.
Dr. Patricia Bath is a pioneer ophthalmologist, inventor, and academic who is known for inventing a tool and procedure for the removal of cataracts using a laser beam called the Laserphaco probe.
The U.S. Patent and Trademark office granted Leonard C. Bailey the patent number 620,286 for the Folding Bed on July 18, 1899. His invention was recommended and adopted by the United States Medical Board for tent and camping purposes.
Bailey also invented the rapid mail-stamping machine, a device to shunt trains to different tracks, and a hernia truss that was adopted by the United States Military.
If you invest to learn... rather than trying to promote your obsessive devotion to the fiction of white superiority... you might become more competent in actually learning.