2154065

Information

• Patent Grant
• 2154065

• References
• Source

• Patent Number

  2,154,065

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1939
  86 years ago

• CPC

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

• US Classifications

  • 236 - Automatic temperature and humidity regulation
  • 318 - Electricity: motive power systems
  • 324 - Electricity: measuring and testing
  • 340 - Communications: electrical
  • 346 - Recorders
  • 361 - Electricity: electrical systems and devices