When was Radio Telescope invented?
In 1931, an engineer Karl Guthe Jansky of Bell Telephone Laboratories built the first radio antenna to identify an astronomical radio source. Grote Reber in 1937 built the first parabolic… Read more »
When was the first headphone invented?
Nathaniel Baldwin invented the first headphone in 1910. The first headphone or earphone was made from leather, ceramics, copper and rubber. John C. Koss in the year 1958 invented the… Read more »
When was Stethoscope invented?
In the year 1916 at the Necker-Enfants Malades Hospital in Paris, the stethoscope was invented by a French physician Rene Laennec by rolling up paper of plentiful sheets. In 1851,… Read more »
When was the first ATM machine invented?
In 1939, Luther George Simjian of America is associated with the invention of the first Automated Teller Machine (ATM). The first commercially successful electronic ATM was invented in 1967 by… Read more »
When were the Credit Cards invented?
Although the credit cards were used in the United States in the 1920s but the first bank credit card was invented in 1946 by John Bigging of the Flatbush National… Read more »
When was the first Machine Gun invented?
The first machine gun called as Defense Gun was invented by James Puckle in 1718. In the year 1884, Sir Hiram Maxim who was an American born British Inventor invented… Read more »
When was the first Cassette player invented?
In the year 1963, Philips introduced the first cassette player in the market and it was originally designed for personal use for dictation and recording devices. As a musical device,… Read more »
When was the plastic invented?
In the year 1885, Alexander Parkes created the first human made plastic called Parkesine. Later it was called Celluloid. At the 1862 Great International Exhibition which was held in London,… Read more »
When was the TNT explosive invented?
TNT stands for Trinitrotoluene and was invented in 1863 by Joseph Wilbrand who was a German scientist. It was initially used as a yellow die. In the year 1902, it… Read more »
When was the barbed wire invented?
Lucien B. Smith in 1867 invented the barbed wire in Kent, Ohio in the United States. In 1874, Joseph F. Glidden was granted patent for the modern invention of barbed… Read more »