1787470

Information

• Patent Grant
• 1787470

• References
• Source

• Patent Number

  1,787,470

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1931
  94 years ago

• CPC

  • F21S48/1181 - having a filament being arranged transversally to the optical axis of the headlamp
  • F21S48/1168 - Incandescent light sources
  • F21S48/1172 - having two or more filaments
  • F21S48/1177 - characterised by the shape of the filament

• US Classifications

  • 362 - Illumination
  • 307 - Electrical transmission or interconnection systems
  • 313 - Electric lamp and discharge devices