2444639

Information

• Patent Grant
• 2444639

• References
• Source

• Patent Number

  2,444,639

• Date Filed

  Not available

• Date Issued

  Tuesday, July 6, 1948
  76 years ago

• CPC

  • G04D7/004 - Optical measuring and testing apparatus
  • G02B21/0016 - Technical microscopes

• US Classifications

  • 356 - Optics: measuring and testing
  • 072 - Metal deforming
  • 968 - Horology