1572544

Information

• Patent Grant
• 1572544

• References
• Source

• Patent Number

  1,572,544

• Date Filed

  Not available

• Date Issued

  Tuesday, February 9, 1926
  98 years ago

• CPC

  • G01J1/38 - using wholly visual means

• US Classifications

  • 356 - Optics: measuring and testing