3768188

Information

• Patent Grant
• 3768188

• References
• Source

• Patent Number

  3,768,188

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1973
  51 years ago

• CPC

  • G09F9/307 - being incandescent filaments
  • G09F9/33 - being semiconductor devices

• US Classifications

  • 040 - Card, picture, or sign exhibiting