1374794

Information

• Patent Grant
• 1374794

• References
• Source

• Patent Number

  1,374,794

• Date Filed

  Not available

• Date Issued

  Tuesday, April 12, 1921
  103 years ago

• CPC

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

• US Classifications

  • 396 - Photography