637366

Information

• Patent Grant
• 637366

• References
• Source

• Patent Number

  637,366

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1899
  125 years ago

• CPC

  • G04B21/005 - Periodical acoustic signalling arrangements

• US Classifications

  • 368 - Horology: time measuring systems or devices