3519213

Information

• Patent Grant
• 3519213

• References
• Source

• Patent Number

  3,519,213

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1970
  54 years ago

• CPC

  • G03B17/305 - for roll film cameras
  • G03B1/54 - Tensionning or loop-maintaining devices
  • G03B21/43 - Driving mechanisms

• US Classifications

  • 242 - Winding, tensioning, or guiding
  • 200 - Electricity: circuit makers and breakers