3657674

Information

• Patent Grant
• 3657674

• References
• Source

• Patent Number

  3,657,674

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1972
  52 years ago

• CPC

  • H01J29/823 - around the neck of the tube

• US Classifications

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