507590

Information

• Patent Grant
• 507590

• References
• Source

• Patent Number

  507,590

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1893
  132 years ago

• CPC

  • B63B43/20 - Feelers

• US Classifications

  • 033 - Geometrical instruments
  • 116 - Signals and indicators