On November 16, 1904, former Edison employee John Ambrose Fleming patented first thermionic (vacuum-tube) diode in Britain. The US patent for the same invention was granted the following year. Today,
these diodes are used in some high-power applications, audiophile devices, and musical instruments. ...
Автор: notebookcheck.net
Источник: https://www.notebookcheck.net/The-diode-celebrates-99th-anniversary.768868.0.html