3021458

Information

• Patent Grant
• 3021458

• References
• Source

• Patent Number

  3,021,458

• Date Filed

  Not available

• Date Issued

  Tuesday, February 13, 1962
  62 years ago

• CPC

  • H01J23/0873 - with at least one axial-field reversal along the interaction space
  • H01J29/68 - using permanent magnets only
  • H01J37/143 - Permanent magnetic lenses

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 315 - Electric lamp and discharge devices: systems