2115831

Information

• Patent Grant
• 2115831

• References
• Source

• Patent Number

  2,115,831

• Date Filed

  Not available

• Date Issued

  Tuesday, May 3, 1938
  86 years ago

• CPC

  • G01R13/08 - Electromechanical recording systems using a mechanical direct-writing method
  • H02P7/00 - Arrangements for regulating or controlling the speed or torque of electric DC motors
  • Y10T74/22 - Miscellaneous

• US Classifications

  • 074 - Machine element or mechanism
  • 200 - Electricity: circuit makers and breakers
  • 236 - Automatic temperature and humidity regulation
  • 324 - Electricity: measuring and testing