1865878

Information

• Patent Grant
• 1865878

• References
• Source

• Patent Number

  1,865,878

• Date Filed

  Not available

• Date Issued

  Tuesday, July 5, 1932
  92 years ago

• CPC

  • G01J5/605 - using visual determination

• US Classifications

  • 356 - Optics: measuring and testing
  • 359 - Optical: systems and elements
  • 374 - Thermal measuring and testing