1971076

Information

• Patent Grant
• 1971076

• References
• Source

• Patent Number

  1,971,076

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1934
  90 years ago

• CPC

  • H01J1/144 - with other metal oxides as an emissive material

• US Classifications

  • 428 - Stock material or miscellaneous articles