2231431

Information

• Patent Grant
• 2231431

• References
• Source

• Patent Number

  2,231,431

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1941
  84 years ago

• CPC

  • G11B25/02 - using cylindrical record carriers
  • Y10S29/052 - Chip breaker
  • Y10S29/079 - Removable debris receptacle
  • Y10S29/102 - Debris chute
  • Y10T82/11 - Talking machine tablet

• US Classifications

  • 082 - Turning
  • 029 - Metal working