3439982

Information

• Patent Grant
• 3439982

• References
• Source

• Patent Number

  3,439,982

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1969
  55 years ago

• CPC

  • G02B27/54 - Schlieren-optical systems

• US Classifications

  • 353 - Optics: image projectors
  • 346 - Recorders
  • 348 - Television
  • 359 - Optical: systems and elements