1477674

Information

• Patent Grant
• 1477674

• References
• Source

• Patent Number

  1,477,674

• Date Filed

  Not available

• Date Issued

  Tuesday, December 18, 1923
  101 years ago

• CPC

  • G03B17/50 - with both developing and finishing apparatus
  • G01L23/14 - by electromagnetic elements

• US Classifications

  • 396 - Photography