3520240

Information

• Patent Grant
• 3520240

• References
• Source

• Patent Number

  3,520,240

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1970
  54 years ago

• CPC

  • G03B9/16 - Two separate members moving in the same direction
  • G03B9/08 - Shutters
  • G03B9/10 - Blade or disc rotating or pivoting about axis normal to its plane
  • G03B9/26 - incorporating cover blade or blades

• US Classifications

  • 396 - Photography