2159453

Information

• Patent Grant
• 2159453

• References
• Source

• Patent Number

  2,159,453

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1939
  85 years ago

• CPC

  • H03G3/16 - having discharge tubes

• US Classifications

  • 455 - Telecommunications
  • 330 - Amplifiers