894654

Information

• Patent Grant
• 894654

• References
• Source

• Patent Number

  894,654

• Date Filed

  Not available

• Date Issued

  Tuesday, July 28, 1908
  116 years ago

• CPC

  • G01J3/461 - with colour spinners

• US Classifications

  • 356 - Optics: measuring and testing
  • 362 - Illumination
  • 446 - Amusement devices: toys