400140

Information

• Patent Grant
• 400140

• References
• Source

• Patent Number

  400,140

• Date Filed

  Not available

• Date Issued

  Tuesday, March 26, 1889
  135 years ago

• CPC

  • F21V17/02 - with provision for adjustment
  • Y10S362/803 - Photo safe lamp

• US Classifications

  • 362 - Illumination
  • 359 - Optical: systems and elements