2187709

Information

• Patent Grant
• 2187709

• References
• Source

• Patent Number

  2,187,709

• Date Filed

  Not available

• Date Issued

  Tuesday, January 16, 1940
  85 years ago

• CPC

  • G03B17/44 - Means for exchanging focusing screen and light sensitive material

• US Classifications

  • 396 - Photography