3700804

Information

• Patent Grant
• 3700804

• References
• Source

• Patent Number

  3,700,804

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1972
  52 years ago

• CPC

  • H01J29/14 - acting by discoloration

• US Classifications

  • 348 - Television
  • 313 - Electric lamp and discharge devices
  • 359 - Optical: systems and elements