2184620

Information

• Patent Grant
• 2184620

• References
• Source

• Patent Number

  2,184,620

• Date Filed

  Not available

• Date Issued

  Tuesday, December 26, 1939
  84 years ago

• CPC

  • G01R13/08 - Electromechanical recording systems using a mechanical direct-writing method

• US Classifications

  • 338 - Electrical resistors
  • 200 - Electricity: circuit makers and breakers
  • 346 - Recorders