Updated: May 23, 2025 by History Computer Staff | Leave a Comment
In 1899 french engineer Georges Lafond from Paris patented (German patent DE148810, US patent US653250 and Swiss patent CH19395) […]
Updated: May 23, 2025 by Austin S. | Leave a Comment
Who Was Samuel Kelso? Samuel Kelso was an inventor from Scotland who immigrated to Canada and later to the United […]
Who is William Lang? William Lang was a leading noise control engineer at IBM and a fellow of the American […]
Updated: May 23, 2025 by Abby | Leave a Comment
: Early computers are amongst some of the most fascinating inventions around, and they were instrumental in changing the way […]
Updated: May 23, 2025 by Lisha Pace | Leave a Comment
Henry Alonzo House Key Facts: Henry Alonzo House (1840-1930) (see biography of Henry Alonzo House) was an extremely prolific American inventor, who […]
: Lewis Hosea and William Beardsley On 3 March 1891, Lewis Hosea (see biography of Lewis Hosea), a lawyer and amateur […]
: While the 20th century saw inventors and mathematicians get closer and closer to the modern calculators and computers we […]
: Jehu Hatfield was an inventor during the 19th century. While he was working with spittoons, pottery, and Lucifer matches, […]
: De Kerniea James Thomas Hiett On 20 April 1897, De Kerniea James Thomas Hiett (1854-1930), an inveterate calculator designer of […]
: Christian Hergenroeder On October 10, 1882, a patent for a simple adding device (US patent 263904) was granted to Christian […]
In 1877, Milton Hinkle invented a simple adding device that resembles and functions similarly to adding devices invented by […]
: Calvin Holman Calvin James Holman (1827-1900) was a prolific inventor, a holder of numerous (at least 12) US patents for […]
Ferdinand Hebentanz On 23 April 1873, Ferdinand Hebentanz, a watchmaker from Budapest, obtained a patent (Privileg) in Austria-Hungary for adding […]
Eduard Hammenstede On March 31st, 1882 Eduard Hammenstede of Cologne, Germany, received German patent No. 20443 on Schnell-Addirmaschine (Quick Adding […]
By the mid-1800s, inventors had been devising mechanical calculators for over 200 years. If you don’t consider the abacus, […]
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George Phineas Gordon: Early Years George Phineas Gordon was born on April 21st, 1810 in Salem, New Hampshire. He went […]
Updated: May 23, 2025 by Rebecca Bales | Leave a Comment
Groesbeck’s Adding Machine John Groesbeck (1834-1884), was a consulting accountant, born in New York, who lived in Philadelphia and was […]
Who Was William S. Gubelmann? William Samuel Gubelmann was an American businessman and inventor. Mr. Gubelmann was born in mid-1865 […]
Updated: May 23, 2025 by Rebecca Bales | 1 Comment on Golden Gem Adding Machine Explained: Everything You Need to Know
The Golden Gem Adding Machine was invented by Russian Jew, Abraham Isaac Gancher. Gancher was a former leather salesman […]
Carlo Fossa Mancini was a true master in the art of hydraulic engineering. His incredible talent and innovative thinking […]
Jean-Paul Garnier was a French mechanic and watchmaker. He won several awards for his watchmaking, with inventions including a […]
Frederick Lincoln Fuller was an American inventor and entrepreneur who made significant contributions to the development of the cash […]
George Fowler was an American inventor who is famous for creating a slide bar adder, known as Fowler’s Adder. […]
Juri Diakov Around 1874, the Russian military engineer from S. Petersburg, Captain Juri I. Diakov (Юрiй И. Дьяковъ), devised a […]
Peter C. Forrester was an extremely prolific inventor who was born in Canada but lived in the U.S. throughout […]
Born in the 19th century in a part of the Russian Empire that is now part of Lithuania, Herschell […]
George Dudley was an American inventor who was known for inventing adding and printing machines. These revolutionary machines could […]
Today, if we want to add some figures, we’re more likely to use the calculator app on our phones […]
In 1677, French Jesuit mathematician Claude Dechales published L’ art de naviger demontré par principes & confirmé par plusiers […]
Alexander Davies was a former clerk and accountant who invented a slide bar adder. The device worked by using […]
In the 1800s, machines called single adders were used. Marshall Cram made one such machine, although it could only […]
Born in 1615, Charles Cotterell was an English courtier who wore many hats throughout his life. He worked as […]
Charles Corliss In 1868, Charles Corliss, a farmer and landowner from Haverhill, Massachusetts, received two patents (one of the patents […]
The Computometer of William George Cordingley The Englishman William George Cordingley, the author of several books for commerce and stock […]
: About Hugo Cook The Indiana-born engineer and instrument maker Hugo Cook (1856-1944) was a holder of many US patents from […]
Samuel Comfort (1837-1923) of Morrisville, Pennsylvania, (see biography of Samuel Comfort) attained considerable distinction as an inventor of improvements […]
: Born in 1847 in Springfield, Massachusetts, Gilbert Chapin received his education in common schools and even worked on a […]
Updated: May 23, 2025 by Heather | Leave a Comment
Invented by James J. Walsh, the Calcumeter was a unique device used for rapidly solving mathematical equations. The device […]
David Carroll was an American inventor who invented an adding machine. This machine was made from wood and metal […]
: Humans are innovators. We’re always looking for a smarter, faster, more efficient way to do things. And if we […]
The first mechanical cash register was patented in 1879 by brothers James and John Ritty. While on a steamboat […]
: Burridge and Marshman were initially known simply as typewriter inventors. However, together they invented an adding machine, an adding […]
: The Scottish inventor and arithmetician, George Brown, had an affinity for all things numbers. He lived during the 1600s […]
Jabez Burns was an American inventor who developed numerous machines, including a coffee roaster, water closet, and window shade […]
: Some inventors’ names are synonymous with their inventions. For example, Thomas Edison is well known for inventing the incandescent […]
: Viktor Bunyakovsky was a renowned Russian mathematician who lived in the 19th century. He introduced several new mathematical concepts […]
: When we think of the arithmetical calculator, we think of a small, rectangular, electronic device that can fit in […]
According to their patent, Borland and Hoffmann designed their adding machine to allow users to “add a column […]
BriCal, meaning British Calculator, is a brass calculator that was designed by Herbert and Mabel Dickinson and patented in […]
In 1642, Blaise Pascal invented the first mechanical calculator. Inventors continued to invent new calculators and adding machines. Some […]
