3841743

Information

• Patent Grant
• 3841743

• References
• Source

• Patent Number

  3,841,743

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1974
  50 years ago

• CPC

  • G03B21/42 - Preventing damage to film due to abnormal operation of projector
  • G03B19/18 - Motion-picture cameras
  • G03B21/2053 - Intensity control of illuminating light
  • G03B21/50 - Control devices operated by the film strip during the run

• US Classifications

  • 352 - Optics: motion pictures