203640

Information

• Patent Grant
• 203640

• References
• Source

• Patent Number

  203,640

• Date Filed

  Not available

• Date Issued

  Tuesday, May 14, 1878
  146 years ago

• CPC

  • G04B19/2532 - automatically corrected at the end of mounths having less than 31 days

• US Classifications

  • 368 - Horology: time measuring systems or devices