3712421

Information

• Patent Grant
• 3712421

• References
• Source

• Patent Number

  3,712,421

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1973
  51 years ago

• CPC

  • F03G1/00 - Spring-motor
  • F03G2730/01 - Spring motors with spiral springs

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 185 - Motors: spring, weight, or animal powered