1988621

Information

• Patent Grant
• 1988621

• References
• Source

• Patent Number

  1,988,621

• Date Filed

  Not available

• Date Issued

  Tuesday, January 22, 1935
  90 years ago

• CPC

  • H03D1/28 - by deflecting an electron beam in a discharge tube

• US Classifications

  • 455 - Telecommunications
  • 332 - Modulators