1377000

Information

• Patent Grant
• 1377000

• References
• Source

• Patent Number

  1,377,000

• Date Filed

  Not available

• Date Issued

  Tuesday, May 3, 1921
  103 years ago

• CPC

  • G04C11/04 - over a line

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 340 - Communications: electrical
  • 968 - Horology