1208279

Information

• Patent Grant
• 1208279

• References
• Source

• Patent Number

  1,208,279

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1916
  108 years ago

• CPC

  • G01J1/28 - using variation of intensity or distance of source

• US Classifications

  • 356 - Optics: measuring and testing
  • 250 - Radiant energy