3131531

Information

• Patent Grant
• 3131531

• References
• Source

• Patent Number

  3,131,531

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1964
  60 years ago

• CPC

  • G04B7/00 - Combined normal and automatic winding up

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology