3563142

Information

• Patent Grant
• 3563142

• References
• Source

• Patent Number

  3,563,142

• Date Filed

  Not available

• Date Issued

  Tuesday, February 16, 1971
  54 years ago

• CPC

  • G03B9/12 - Two relatively-adjustable aperture-defining members moving as a unit
  • G03B7/085 - for control of aperture
  • G03B9/10 - Blade or disc rotating or pivoting about axis normal to its plane

• US Classifications

  • 396 - Photography