When was the electric water heater invented?
In 1889, Norwegian-American engineer Edwin Ruud invented the first electric water heater in the United States and founded the Rudd Manufacturing Company.
Author Archives: raman
When was the Insulin discovered?
In 1869, insulin was discovered in the pancreas by a Berlin student Paul Langerhans. The Romanian scientist Nicolae Paulescu discovered the insulin in 1916. Two Canadian scientists Banting and Macleod… Read more »
When was the Piano invented?
In 1709, the first piano was invented by Bartolomeo Cristofori of Padua in Italy. In 1768, Johann Christian Bach played the piano for the first time in public concert in… Read more »
When was the Silly Putty invented?
In the year 1943, Silly Putty was first invented by James Wright when he accidentally dropped boric acid into silicone oil. Dr. Earl Warrick, of the Dow Corning Corporation, also… Read more »
When was the Digital Camera invented?
In 1975, an engineer Steven Sasson invented the first digital camera at Eastman Kodak. But it was not very practical and recorded only black and white images, with a resolution… Read more »
When was the first Compass invented?
The first compass was invented around 247 B.C. in China and by the eleventh century it was used for navigation. In medieval Europe around 1300 the dry compass was invented… Read more »
When was the Hearing Aid invented?
In 1898, the first electric hearing aid was invented by Miller Reese Hutchinson and the company Akoulathon built and sold this instrument. He later improved his invention in 1901 and… Read more »
When was the first Candy invented?
Around 1500 B.C., the candy was invented by the Egyptians to worship their Gods and Goddesses. They used honey and by adding dates, figs, spices and nuts prepared candy. In… Read more »
When was Life Savers Candy invented?
Life Savers as a summer candy was invented in 1912 by a candy manufacturer Clarence Crane of Cleveland in Ohio. These are ring shaped mints of an American brand and… Read more »
When was pencil invented?
The first quality pencil was invented by mixing graphite with right kinds of clay in 1795 by a French officer Nicholas Jacques Conte. He discovered the ground graphite and when… Read more »