National String Instrument Corporation

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National String Instrument Corp.
Industry Musical instruments
Successor National Reso-Phonic Guitar
Founded 1927 in Los Angeles, California [1][2]
Founder John Dopyera
George Beauchamp
Defunct 1932; 89 years ago (1932)
(merged to Dobro)
Headquarters Los Angeles, California, USA
Products Resonator guitars

The National String Instrument Corporation was a guitar company that formed to manufacture the first resonator guitars. National also produced resonator ukuleles and mandolins.


First years

1928 National Style O plectrum guitar.
1930 National Triolian resonator mandolin.

The company was formed by John Dopyera, the luthier who invented the resonator, and George Beauchamp, a steel guitar player who had suggested to Dopyera the need for a guitar loud enough to play a melody over brass and other wind instruments.[3]

In 1927, National produced the first resonator instruments and sold under their National brand. They had metal bodies and a tricone resonator system, with three aluminium cones joined by a T-shaped aluminium spider. Wooden-bodied models soon followed, based on inexpensive plywood student guitar bodies supplied by Kay, Harmony, and other established instrument manufacturers.[3]


In 1928, Dopyera left National, and with four of his brothers formed the Dobro Manufacturing Company to produce a competing single resonator design, with the resonator cone inverted. John Dopyera continued to hold stock in National. The Dobro design was both cheaper to produce and louder than the tricone.[3]

National soon introduced their own single resonator design, the biscuit, which Dopyera claimed to have designed before leaving, though the patent was registered by Beauchamp. National also continued to produce tricone designs, which some players preferred.

In their 1930 catalog, National list eight key associates, including Adolph Rickenbacker, George Beauchamp, Harry Watson, Paul Barth, and Jack Levy.[4]

In 1932, the Dopyera brothers secured a controlling interest in both National and Dobro, and merged the companies to form the National Dobro Corporation.

National Reso-Phonic Guitars

In 1989 a new company in California named National Reso-Phonic Guitars[5] began manufacturing reproductions of resonator instruments based on designs originated by John Dopyera.

Resonator guitar designs

The National brand and trademark are particularly associated with two of the three basic resonator designs:

  • The tricone design with three resonator cones
  • The biscuit design with a single cone

Terms such as National or National pattern are often used to distinguish these patterns from the Dobro design.

Notable artists

Son House and Peetie Wheatstraw were some of the musicians using National resonator guitars.

Some of the artists that used National guitars were:[2]

See also

Further reading


  1. National Guitars history at Bob Brozman website
  2. 2.0 2.1 History of National guitars
  3. 3.0 3.1 3.2 Rickenbacker International Corporation, [1], The Earliest Days of the Electric Guitar. Retrieved on 20 February 2012.
  4. Tom Wheeler, The Guitar Book: A Handbook for Electric & Acoustic Guitarists. Harpercollins (1978). ISBN 0-06-014579-X, p. 153
  5. California Secretary of State, Business Search [2]. Retrieved on 24 July 2014.

External links