3721317

Information

• Patent Grant
• 3721317

• References
• Source

• Patent Number

  3,721,317

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  51 years ago

• CPC

  • F03G1/00 - Spring-motor
  • F03G2730/03 - Spring motors with torsion springs
  • Y10S185/01 - Spring powered toys

• US Classifications

  • 185 - Motors: spring, weight, or animal powered
  • 446 - Amusement devices: toys