2522187

Information

• Patent Grant
• 2522187

• References
• Source

• Patent Number

  2,522,187

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1950
  74 years ago

• CPC

  • G03B17/24 - with means for separately producing marks on the film
  • G03B2217/245 - Mechanical devices
  • Y10T83/0393 - With means to rotate blade

• US Classifications

  • 352 - Optics: motion pictures
  • 033 - Geometrical instruments
  • 083 - Cutting
  • 396 - Photography