2147142

Information

• Patent Grant
• 2147142

• References
• Source

• Patent Number

  2,147,142

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1939
  86 years ago

• CPC

  • H03D1/26 - by means of transit-time tubes
  • H01Q15/12 - functioning also as polarisation filter

• US Classifications

  • 455 - Telecommunications
  • 329 - Demodulators
  • 343 - Communications: radio wave antennas