2569228

Information

• Patent Grant
• 2569228

• References
• Source

• Patent Number

  2,569,228

• Date Filed

  Not available

• Date Issued

  Tuesday, September 25, 1951
  73 years ago

• CPC

  • G03C7/22 - Subtractive cinematographic processes Materials therefor Preparing or processing such materials

• US Classifications

  • 340 - Communications: electrical
  • 226 - Advancing material of indeterminate length
  • 352 - Optics: motion pictures
  • 356 - Optics: measuring and testing