2438331

Information

• Patent Grant
• 2438331

• References
• Source

• Patent Number

  2,438,331

• Date Filed

  Not available

• Date Issued

  Tuesday, March 23, 1948
  77 years ago

• CPC

  • G08B9/04 - Means for recording operation of the apparatus

• US Classifications

  • 346 - Recorders