3814213

Information

• Patent Grant
• 3814213

• References
• Source

• Patent Number

  3,814,213

• Date Filed

  Not available

• Date Issued

  Tuesday, June 4, 1974
  50 years ago

• CPC

  • F03G1/00 - Spring-motor
  • F03G2730/01 - Spring motors with spiral springs
  • Y10T16/641 - Drum and cord

• US Classifications

  • 185 - Motors: spring, weight, or animal powered
  • 016 - Miscellaneous hardware
  • 049 - Movable or removable closures
  • 242 - Winding, tensioning, or guiding