2986986

Information

• Patent Grant
• 2986986

• References
• Source

• Patent Number

  2,986,986

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1961
  63 years ago

• CPC

  • G03B9/60 - by varying speed of movement of obturating members
  • G03B9/10 - Blade or disc rotating or pivoting about axis normal to its plane

• US Classifications

  • 396 - Photography