1622925

Information

• Patent Grant
• 1622925

• References
• Source

• Patent Number

  1,622,925

• Date Filed

  Not available

• Date Issued

  Tuesday, March 29, 1927
  98 years ago

• CPC

  • G03B17/24 - with means for separately producing marks on the film
  • G03B2217/242 - Details of the marking device

• US Classifications

  • 396 - Photography