2130404

Information

• Patent Grant
• 2130404

• References
• Source

• Patent Number

  2,130,404

• Date Filed

  Not available

• Date Issued

  Tuesday, September 20, 1938
  86 years ago

• CPC

  • H03G3/16 - having discharge tubes

• US Classifications

  • 455 - Telecommunications
  • 330 - Amplifiers