3696981

Information

• Patent Grant
• 3696981

• References
• Source

• Patent Number

  3,696,981

• Date Filed

  Not available

• Date Issued

  Tuesday, October 10, 1972
  52 years ago

• CPC

  • G09B9/304 - by using a film
  • G03B19/18 - Motion-picture cameras
  • G03B21/42 - Preventing damage to film due to abnormal operation of projector

• US Classifications

  • 226 - Advancing material of indeterminate length
  • 250 - Radiant energy