The string quartet dates from at least the 1750s, with the works of Franz Xaver Richter, Luigi Boccherini, and early Haydn.
It's actually fairly hard to pin down, though. Two violins, viola, and cello is also the standard string section of an orchestra, so how do we know something was written for just four players and not for an ensemble of varying numbers?
By the time we get to Haydn's mature quartets it is obvious--it would sound silly for a string orchestra to play these soloistic parts. But in his op. 1, there isn't that distinction. In fact, there are optional wind parts for some of the op. 1 quartets, which leads us to think they may also have been performed as divertimentos or even as small symphonies.
nuno flores string quartet or corvonuno string quartet
The Guarneri Quartet was an American string quartet founded in 1964 and disbanded in 2009.
Atrium String Quartet was created in 2000.
FourPlay String Quartet was created in 1995.
Alba String Quartet was created in 2003.
Vertavo String Quartet was created in 1984.
Oberlin String Quartet ended in 1959.
London String Quartet was created in 1908.
Dubois String Quartet was created in 1910.
Dubois String Quartet ended in 1938.
Miami String Quartet was created in 1988.
Hawthorne String Quartet was created in 1986.