Braille system of writing and reading for the blind was invented in 1824 by Louis Braille who, himself, had been blind since age 3.
Between the beginning of the 19th century and end of the 20th century (about 200 years), the height of an American adult male increased by about two inches growing from about 5’7” tall to about 5’9” on the average. Gauge the gain of 2 inches in just 200 years against the millions of years man has existed on earth. Furthermore, between the beginning and close of the 20th century, the United States of America raised life expectancy of its citizens from an average of 47 years to 77 years.
July 2, 1908 was the day Hans Wilsdorf registered the trademark ROLEX for the prestigious wrist watch.
Bayer, the German pharmaceutical company, owned the pain killer brand name ASPIRIN but was forced to relinquish the trademark as part of Treaty of Versailles after Germany lost the first World War.
The first cellphone was introduced in 1983 by Motorola. It was named Dyna TAC 8000x.