1015515

Information

• Patent Grant
• 1015515

• References
• Source

• Patent Number

  1,015,515

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1912
  113 years ago

• CPC

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

• US Classifications

  • 356 - Optics: measuring and testing