Updated: May 23, 2025 by Abby | Leave a Comment
Key Points 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 […]
: De Kerniea James Thomas Hiett On 20 April 1897, De Kerniea James Thomas Hiett (1854-1930), an inveterate calculator designer of […]
Updated: May 23, 2025 by History Computer Staff | Leave a Comment
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 […]
Updated: May 23, 2025 by Austin S. | Leave a Comment
George Phineas Gordon: Early Years George Phineas Gordon was born on April 21st, 1810 in Salem, New Hampshire. He went […]
Who Was William S. Gubelmann? William Samuel Gubelmann was an American businessman and inventor. Mr. Gubelmann was born in mid-1865 […]
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By the mid-1800s, inventors had been devising mechanical calculators for over 200 years. If you don’t consider the abacus, […]
Updated: May 23, 2025 by Rebecca Bales | Leave a Comment
George Fowler was an American inventor who is famous for creating a slide bar adder, known as Fowler’s Adder. […]
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 […]
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 […]
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 […]
Alexander Davies was a former clerk and accountant who invented a slide bar adder. The device worked by using […]
Updated: May 23, 2025 by Lisha Pace | Leave a Comment
Samuel Comfort (1837-1923) of Morrisville, Pennsylvania, (see biography of Samuel Comfort) attained considerable distinction as an inventor of improvements […]
: About Hugo Cook The Indiana-born engineer and instrument maker Hugo Cook (1856-1944) was a holder of many US patents from […]
