3885971

Information

• Patent Grant
• 3885971

• References
• Source

• Patent Number

  3,885,971

• Date Filed

  Not available

• Date Issued

  Tuesday, May 27, 1975
  49 years ago

• CPC

  • G02B27/46 - Systems using spatial filters
  • G03B15/00 - Special procedures for taking photographs Apparatus therefor
  • G03C5/02 - Sensitometric processes
  • G03F5/14 - by contact methods

• US Classifications

  • 359 - Optical: systems and elements