3616643

Information

• Patent Grant
• 3616643

• References
• Source

• Patent Number

  3,616,643

• Date Filed

  Not available

• Date Issued

  Tuesday, November 2, 1971
  53 years ago

• CPC

  • G04C17/0075 - by drums or drum-like devices
  • G04B19/21 - Drums

• US Classifications

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