2251984

Information

• Patent Grant
• 2251984

• References
• Source

• Patent Number

  2,251,984

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1941
  83 years ago

• CPC

  • G01R13/202 - Non-electric appliances

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 116 - Signals and indicators
  • 353 - Optics: image projectors
  • 359 - Optical: systems and elements
  • 362 - Illumination