505243

Information

• Patent Grant
• 505243

• References
• Source

• Patent Number

  505,243

• Date Filed

  Not available

• Date Issued

  Tuesday, September 19, 1893
  131 years ago

• CPC

  • G07C5/12 - in graphical form
  • G01D9/20 - the recording element

• US Classifications

  • 346 - Recorders
  • 324 - Electricity: measuring and testing