3721931

Information

• Patent Grant
• 3721931

• References
• Source

• Patent Number

  3,721,931

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  51 years ago

• CPC

  • H01J29/465 - for simultaneous focalisation and deflection of ray or beam

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets