3848977

Information

• Patent Grant
• 3848977

• References
• Source

• Patent Number

  3,848,977

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1974
  50 years ago

• CPC

  • G03B31/02 - in which sound track is on a moving-picture film
  • G03B19/16 - Pin-hole cameras

• US Classifications

  • 352 - Optics: motion pictures
  • 226 - Advancing material of indeterminate length