3581002

Information

• Patent Grant
• 3581002

• References
• Source

• Patent Number

  3,581,002

• Date Filed

  Not available

• Date Issued

  Tuesday, May 25, 1971
  53 years ago

• CPC

  • G02F1/134309 - characterised by their geometrical arrangement
  • G02B27/32 - Fiducial marks and measuring scales within the optical system
  • H01J29/34 - provided with permanent marks or references
  • H01J31/121 - tubes for oscillography

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 252 - Compositions
  • 349 - Liquid crystal cells, elements and systems