1904129

Information

• Patent Grant
• 1904129

• References
• Source

• Patent Number

  1,904,129

• Date Filed

  Not available

• Date Issued

  Tuesday, April 18, 1933
  91 years ago

• CPC

  • H01K3/305 - Testing of incandescent lamps

• US Classifications

  • 324 - Electricity: measuring and testing
  • 315 - Electric lamp and discharge devices: systems
  • 374 - Thermal measuring and testing
  • 377 - Electrical pulse counters, pulse dividers, or shift registers: circuits and systems