1291848

Information

• Patent Grant
• 1291848

• References
• Source

• Patent Number

  1,291,848

• Date Filed

  Not available

• Date Issued

  Tuesday, January 21, 1919
  105 years ago

• CPC

  • G01C3/24 - using a parallactic triangle with fixed angles and a base of variable length in the observation station
  • G02F1/1335 - Structural association of optical devices

• US Classifications

  • 356 - Optics: measuring and testing