3270638

Information

• Patent Grant
• 3270638

• References
• Source

• Patent Number

  3,270,638

• Date Filed

  Not available

• Date Issued

  Tuesday, September 6, 1966
  58 years ago

• CPC

  • G01J1/4214 - specially adapted for view-taking apparatus
  • G01J1/48 - using chemical effects
  • G03B7/08 - Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
  • G03B7/18 - in accordance with light-reducing "factor" of filter or other obturator used with or on the lens of the camera
  • G01J1/0403 - Mechanical elements; Supports for optical elements; Scanning arrangements
  • G01J1/0418 - using attenuators

• US Classifications

  • 396 - Photography
  • 250 - Radiant energy
  • 356 - Optics: measuring and testing