3528350

Information

• Patent Grant
• 3528350

• References
• Source

• Patent Number

  3,528,350

• Date Filed

  Not available

• Date Issued

  Tuesday, September 15, 1970
  54 years ago

• CPC

  • G03B7/083 - for control of exposure time
  • G01J1/1626 - Arrangements with two photodetectors, the signals of which are compared
  • G01J1/44 - Electric circuits
  • G03B7/04 - Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device
  • G03B9/58 - Means for varying duration of "open" period of shutter

• US Classifications

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