1347155

Information

• Patent Grant
• 1347155

• References
• Source

• Patent Number

  1,347,155

• Date Filed

  Not available

• Date Issued

  Tuesday, July 20, 1920
  104 years ago

• CPC

  • G02B21/34 - Microscope slides
  • G04D7/004 - Optical measuring and testing apparatus

• US Classifications

  • 359 - Optical: systems and elements
  • 968 - Horology