2097578

Information

• Patent Grant
• 2097578

• References
• Source

• Patent Number

  2,097,578

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1937
  87 years ago

• CPC

  • G01R13/12 - Chemical recording

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 246 - Railway switches and signals
  • 315 - Electric lamp and discharge devices: systems
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems