3555987

Information

• Patent Grant
• 3555987

• References
• Source

• Patent Number

  3,555,987

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1971
  53 years ago

• CPC

  • G02F1/0556 - specially adapted for a particular application
  • G02F1/0551 - Constructional details
  • G03B9/08 - Shutters

• US Classifications

  • 396 - Photography
  • 359 - Optical: systems and elements