2347990

Information

• Patent Grant
• 2347990

• References
• Source

• Patent Number

  2,347,990

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1944
  80 years ago

• CPC

  • H01J25/32 - Tubes with plural reflection
  • H01J3/029 - Schematic arrangements for beam forming
  • H01J29/58 - Arrangements for focusing or reflecting ray or beam
  • H01J29/64 - Magnetic lenses

• US Classifications

  • 313 - Electric lamp and discharge devices