1856389

Information

• Patent Grant
• 1856389

• References
• Source

• Patent Number

  1,856,389

• Date Filed

  Not available

• Date Issued

  Tuesday, May 3, 1932
  92 years ago

• CPC

  • G04B37/082 - without special hermetic sealing pieces

• US Classifications

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