490203

Information

• Patent Grant
• 490203

• References
• Source

• Patent Number

  490,203

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1893
  131 years ago

• CPC

  • G04D7/1271 - for the control mechanism only (from outside the clockwork)

• US Classifications

  • 073 - Measuring and testing