1405208

Information

• Patent Grant
• 1405208

• References
• Source

• Patent Number

  1,405,208

• Date Filed

  Not available

• Date Issued

  Tuesday, January 31, 1922
  102 years ago

• CPC

  • G11B3/66 - Erasing information

• US Classifications

  • 252 - Compositions
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 369 - Dynamic information storage or retrieval