3820138

Information

• Patent Grant
• 3820138

• References
• Source

• Patent Number

  3,820,138

• Date Filed

  Not available

• Date Issued

  Tuesday, June 25, 1974
  50 years ago

• CPC

  • G03B15/0489 - Means for ignition by percussion
  • G03B9/70 - with flash-synchronising contacts
  • G03B17/42 - Interlocking between shutter operation and advance of film or change of plate or cut-film

• US Classifications

  • 396 - Photography