Updated: May 23, 2025 by Rebecca Bales | Leave a Comment
Key Points Frederick Parsons Warren around 1868 (© Michigan State University) Calculating Engine of Frederick Warren In 1864, Frederick Warren, a young man […]
Updated: May 23, 2025 by Abby | Leave a Comment
: The Calculators of Louis Troncet After the slide adders of Claude Perrault, Caze, and Heinrich Kummer, in 1889 the Frenchman […]
During the age of invention, some ideas were simply too big and too great to be contained by one […]
: Lawrence Swem On 8 June 1886, Lawrence W. Swem, a jeweler of West Liberty, Muscatine, Iowa, patented a keyboard adder […]
: Elmore Taylor In 1874, Elmore W. Taylor of Franklin, Indiana, patented a circular adding machine (US patent 155772), assigning one-half […]
Updated: May 23, 2025 by Heather | Leave a Comment
: Thomas Strode was quite a multifaceted person. He spent his days working as a shopkeeper and farmer in […]
: Spalding Adding Machine Cyrus G. Spalding of Boston, Massachusetts, was a holder of two US patents for adding machines: […]
: Stephenson’s Adding Machine Archibald M. Stephenson (1844-1913) of Manteno, Illinois, took out a US patent №137167 for Adding Machine […]
: Born in southeast England, Leonard Stowe set off to New Zealand when he was just 21 years old. […]
: Jacob Schnarrenberger Jacob H. Schnarrenberger of Springfield and Greenfield, Ohio, was a holder of quite a few (at least […]
: Who Was Dr. Walter Snelling? Born on December 13, 1880, Dr. Walter Snelling was a chemist and a significant […]
: Brainard Smith was an American inventor and engineer from Sacramento. He is best known for the creation of […]
: Samuel Webb Samuel J. Webb (1862-1909) was a businessman and prolific inventor from Minden, Louisiana. He invented more than […]
: David Marion Rush David Marion Rush of Louisburg, Missouri, applied for a patent for ten-key non-printing manually operated adding […]
: Harry Humfrey Rumble On 15 September 1890, the young architect and civil engineer Harry Humfrey Rumble (1866-1948), from Westgate-on-Sea, […]
: The early work of John Henry and Caleb Sherwood Odell in their pipe organ-building firm cannot be discussed […]
: Martial Roussel On 3 October 1853, Martial Roussel, a member of the Amiens Academy (Somme), applied for a patent […]
Updated: May 23, 2025 by History Computer Staff | Leave a Comment
Who was Reuben Rodney James? Reuben Rodney James worked as a farmer and in a woolen mill. He also invented […]
: James Ritty In 1878 one James Ritty (see biography of James Ritty), a 42 years old saloon keeper from […]
Who Were Moses and William Pullen? Moses and William Pullen are known for their invention of the Bentham Calculating Machine. […]
Updated: May 23, 2025 by Austin S. | Leave a Comment
Adding machines are some of the most fascinating inventions and are important too. The early inventions were instrumental in […]
William Pratt was a mathematician and a member of the active circle of London’s Mathematical teachers. William Pratt invented […]
Fawcett Plumb On 17 June 1881, Fawcett Plumb (1834-1919), a businessman, politician, and prolific inventor from Streator, Illinois, (see the […]
With at least 33 patents in the U.S. alone, William Prehn Quentell was responsible for many inventions and is […]
