Top 10 in­ven­tors facts

Lack of possibility to use metallic cartridges. Samuel Colt missed a great opportunity in firearms development when he dismissed an idea from one of his gunsmiths, Rollin White. White proposed a "bored-through" revolver cylinder to allow the use of metallic cartridges in a handgun. After Colt fired White for suggesting an improvement to his revolver, White took his idea to Colt's competitor, Smith & Wesson, who patented his invention and kept Colt from being able to build cartridge firearms for almost 20 years.

Gabriel Daniel Fahrenheit. Daniel Gabriel Fahrenheit was a German physicist, engineer, and glass blower who is best known for inventing the mercury-in-glass thermometer (1714), and for developing a temperature scale now named after him

Andrea Amati. The oldest documented violin to have four strings, like the modern violin, is supposed to have been constructed in 1555 by Andrea Amati. Earlier instruments only had three strings and were called violetta. The violin immediately became very popular, both among street musicians and the nobility.

In his will. According to the Alfred Nobel's will and testament read in Stockholm on 30th December 1896, a foundation established by Alfred Nobel would reward those who serve humanity. He bequeathed from the shares 94% of his fortune, that now forms the economic base of the Nobel Prize.

Christopher Latham Sholes. QWERTY - a symbolic Latin alphabetical name for typewriters and computers, taken from the first six letters in a row below the row of digits, viewed from the left. The first typewriters used an alphabetical key setting. However, with the fast typing of the neighborhood of frequently used keys caused mutual jamming of the arms with the fonts. In 1878, the first typewriter with a QWERTY keyboard was patented. The creator of the QWERTY layout was American journalist and inventor Christopher Latham Sholes.

Serbian. Nikola Tesla was born on 10 July 1856 to Serbian parents in the village of Smiljan, Austrian Empire (modern-day Croatia). He studied at Austrian Polytechnic in Graz (he didn't finish it even though he was getting the highest possible grades), later moved to Prague, Budapest and France. Eventually he relocated to New York City aged 28.

Charles Goodyear for many years improved the method of hardening the rubber. When he succeeded in 1839, investors were already offended by earlier failures. Charles died in misery. The Goodyear company was named in his honor, but otherwise is not related to him.

Joseph van Fraunhofer. Joseph Ritter von Fraunhofer was a Bavarian physicist and optical lens manufacturer. He made optical glass and achromatic telescope objective lenses, invented the spectroscope, and developed diffraction grating.

Nikola Tesla. Marconi was credited to be the first radio constructor, but in 1943 the US Supreme Court has granted patent rights to Tesla patent. Marconi admitted he was using Tesla's work in his construction.

Avtomat Kalashnikov. AK - Avtomat Kalashnikov. An automatic rifle created by Mikhail Kalashnikov, originally implemented and designated AK-47, the rifle design was closely based on the Nazi Strumgewhr-44 (STG-44) (English: Assault Rifle, 1944).