1755793

Information

• Patent Grant
• 1755793

• References
• Source

• Patent Number

  1,755,793

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1930
  94 years ago

• CPC

  • G01R13/12 - Chemical recording

• US Classifications

  • 346 - Recorders
  • 369 - Dynamic information storage or retrieval