2147143

Information

• Patent Grant
• 2147143

• References
• Source

• Patent Number

  2,147,143

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1939
  86 years ago

• CPC

  • H03D1/26 - by means of transit-time tubes

• US Classifications

  • 329 - Demodulators
  • 313 - Electric lamp and discharge devices