2178641

Information

• Patent Grant
• 2178641

• References
• Source

• Patent Number

  2,178,641

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1939
  85 years ago

• CPC

  • G01R13/08 - Electromechanical recording systems using a mechanical direct-writing method
  • Y10T74/18096 - Shifting rack

• US Classifications

  • 476 - Friction gear transmission systems or components
  • 073 - Measuring and testing
  • 074 - Machine element or mechanism
  • 192 - Clutches and power-stop control
  • 346 - Recorders
  • 369 - Dynamic information storage or retrieval