1421092

Information

• Patent Grant
• 1421092

• References
• Source

• Patent Number

  1,421,092

• Date Filed

  Not available

• Date Issued

  Tuesday, June 27, 1922
  102 years ago

• CPC

  • G03B19/08 - with provision for alternative use with plates or cut-films

• US Classifications

  • 396 - Photography