Samuel Colt is granted a United States patent for his revolver firearm.

Samuel Colt was an American inventor, industrialist, and businessman who established Colt's Patent Fire-Arms Manufacturing Company and made the mass production of revolvers commercially viable.

A patent is a type of intellectual property that gives its owner the legal right to exclude others from making, using, or selling an invention for a limited period of time in exchange for publishing an enabling disclosure of the invention. In most countries, patent rights fall under private law and the patent holder must sue someone infringing the patent in order to enforce their rights.

A revolver is a repeating handgun with at least one barrel and a revolving cylinder containing multiple chambers for firing. Because most revolver models hold six cartridges before needing to be reloaded, revolvers are commonly called six shooters or sixguns. Due to their rotating cylinder mechanism, they may also be called wheel guns.

February 25 is the 56th day of the year in the Gregorian calendar; 309 days remain until the end of the year.