2404302

Information

• Patent Grant
• 2404302

• References
• Source

• Patent Number

  2,404,302

• Date Filed

  Not available

• Date Issued

  Tuesday, July 16, 1946
  77 years ago

• CPC

  • G01C3/16 - Measuring marks

• US Classifications

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