2661650

Information

• Patent Grant
• 2661650

• References
• Source

• Patent Number

  2,661,650

• Date Filed

  Not available

• Date Issued

  Tuesday, December 8, 1953
  71 years ago

• CPC

  • G01J1/22 - using a variable element in the light-path

• US Classifications

  • 356 - Optics: measuring and testing