As the United States' national sport and pastime, baseball is a bat-and-ball sport played between two teams of nine players each. Some attribute baseball's beginnings to the English sports of… » more details

The combine harvester, or combine, or thresher, is a machine that combines the tasks of harvesting, threshing, and cleaning grain crops. The objective is to complete these three processes, which… » more details

A revolver is a repeating firearm with multiple chambers and at least one barrel for firing. As the user cocks the hammer, the cylinder revolves to align the next round… » more details

The electromagnetic telegraph is a device that can send coded text messages over wire. In 1831, an American scientist, Joseph Henry, made an important discovery in electric induction which became… » more details

The electromagnetic telegraph is a device that can send coded text messages over wire. In 1831, an American scientist, Joseph Henry, made an important discovery in electric induction which became… » more details

The American inventor Oliver Evans, acclaimed as the "father of refrigeration," designed the vaporized refrigeration machine in 1805. However, Jacob Perkins modified Evans' original design, building the world's first refrigerator… » more details

An amphibious vehicle is one which can be used on land or water. Oliver Evan's "Orukter Amphibolos" dredged the waters near the Philadelphia docks. Its steam-powered engine drove either wooden… » more details

A sextant is an instrument which measures the angle of an object above the horizon. The angle, and the time when it was measured, can be used to calculate a… » more details

This article is a timeline of inventions made by people who were citizens of the United States, or its predecessor colonies. On March 6, 1646, the first patent in North… » more details

Founded     Albuquerque, New Mexico (April 4, 1975 (1975-04-04)) Founder(s)     Bill Gates Paul Allen Headquarters     Redmond, Washington, United States Area served     Worldwide Key people     Bill Gates… » more details