870481

Information

• Patent Grant
• 870481

• References
• Source

• Patent Number

  870,481

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1907
  117 years ago

• CPC

  • G04B25/02 - by feeling Clocks or watches for blind persons

• US Classifications

  • 368 - Horology: time measuring systems or devices