1561583

Information

• Patent Grant
• 1561583

• References
• Source

• Patent Number

  1,561,583

• Date Filed

  Not available

• Date Issued

  Tuesday, November 17, 1925
  99 years ago

• CPC

  • G01J5/54 - Optical features

• US Classifications

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