3257507

Information

• Patent Grant
• 3257507

• References
• Source

• Patent Number

  3,257,507

• Date Filed

  Not available

• Date Issued

  Tuesday, June 21, 1966
  58 years ago

• CPC

  • G03B11/046 - for viewfinders or eyepieces

• US Classifications

  • 348 - Television
  • 359 - Optical: systems and elements