2839977

Information

• Patent Grant
• 2839977

• References
• Source

• Patent Number

  2,839,977

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1958
  66 years ago

• CPC

  • G03B11/046 - for viewfinders or eyepieces

• US Classifications

  • 396 - Photography
  • 033 - Geometrical instruments