3820128

Information

• Patent Grant
• 3820128

• References
• Source

• Patent Number

  3,820,128

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1974
  50 years ago

• CPC

  • G03B15/0452 - Electrical ignition means connected to the shutter
  • G03B7/091 - Digital circuits
  • G03B7/16 - in accordance with both the intensity of the flash source and the distance of the flash source from the object
  • G03B9/58 - Means for varying duration of "open" period of shutter

• US Classifications

  • 396 - Photography