2857544

Information

• Patent Grant
• 2857544

• References
• Source

• Patent Number

  2,857,544

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1958
  66 years ago

• CPC

  • H01J19/40 - Screens for shielding

• US Classifications

  • 313 - Electric lamp and discharge devices