Valdemar Poulsen patented in Denmark on Dec. 1, 1898, the first magnetic recorder, called the "telegraphone," using steel wire; he exhibited his device at the Paris Exposition in 1900 and formed the American Telegraphone Co. in Nov. 1903 after Congress validated his American patent 661,619.

telegraphone 1907, from LC
telegraphone with operator 1907, from LC

American Telegraphone model c.1915
American Telegraphone
from Audio, August 1984

2007 by Steven E. Schoenherr. All rights reserved.

this page revised March 22, 2007 by Schoenherr | Return to Recording Technology History